That's great, however, at first glance it looks like a vandalism. If you intend to fix something, try to do it in one go, or at least piece by piece.

One thing worth nothing is that buildings are not just outlines. There could be plenty of tags useful to others and difficult to recover once an area is deleted. e.g. Tesco's building has all of those tags associated:

addr:city=Peterborough
addr:housename=The Werrington Centre
addr:postcode=PE4 6NA
addr:street=Staniland Way
branch=Peterborough Werrington Superstore
brand=Tesco
brand:wikidata=Q487494
brand:wikipedia=en:Tesco
building=yes
check_date:opening_hours=2021-11-13
contact:website=https://www.tesco.com/store-locator/peterborough/the-werrington-centre
fhrs:id=247147
name=Tesco
opening_hours=Mo-Sa 07:00-23:00; Su 10:00-16:00
operator=Tesco Stores Ltd
shop=supermarket

I was struggling with the concept of OSM being a database, more than a map, for quite some time. We see a map with building, streets and paths; others use the data that's not normally rendered in the browser:
e.g: https://openaedmap.org/#map=3/47.74/-8
It is worth checking what information an object already has before it is removed, someone my need it in the future.

You will notice I reverted some of the deleted futures, added some detail and information.

Hi,
Are you sure you wanted to remove all the buildings, roads and POIs?

Hi Artur'In,

are you sure this is a correct location for a car shop?

Sales must be really poor here ;)

Hallo, ich kann nur verbessern, was ich finden kann. Bitte sehen Sie, wie der von Ihnen Turm aussieht.
https://demo.f4map.com/#lat=51.2070359&lon=16.1612220&zoom=20&camera.theta=45.623&camera.phi=-25.497

Hi Pavol33,
Thank you for adding more detail to Legnica area.
I am not entirely sure if adding the church towers to Layer=1 is a good idea. Please look here:
osm.wiki/wiki/3D#Tagging
and here:
osm.wiki/Simple_3D_Buildings
for simple description on how to build 3D objects.

trochę ogarnąłem, masz rację że sporo z tych zielonych placków to trawniki.

Jeżeli mogę cię prosić to na przyszłość zmieniaj tagi, dodawaj 'fixme' zamiast usuwać obiekty. Łatwiej zmienić tagi i podrasować kształt niż rysować cały trawnik od początku.

Czesc,
Widze ze usunales sporo zielonych miejsc z osiedla Kopernika. Zgodze sie ze leasure=park to moze nie najlepszy tag ale zeby zaraz usuwac?
Co powiesz na przywrocenie niektorych trawnikow, np miedzy Heweliusza a Horyzontalna?
Zielonego nigdy dosc, latwiej nawigowac w miescie.

Nie no kasować szkoda, bo zrobiłeś kawał dobrej roboty. Jak się okarze, że jednak droga pójdzie za oś. Piekary to będzie już gotowy profil.

Czesc,
Widze ze dodales proponowany przebieg jednej z propozycji dla obwodnicy Legnicy. Zastanawiam sie czy zgodzisz sie zeby zaczekac na decyzje po konsultacjach, bo teraz dodajemy dane ktore moga nigdy sie nie przydac.
Opcje teoretycznie sa trzy ale od lat mowa jest tylko o jednej (i nie tej ktora dorysowales)
https://fakty.lca.pl/legnica,news,86487,B_d_konsultacje_spo_eczne_w_sprawie_obwodnicy_po_udniowo_wschodniej.html

I think your amendments to the Boongate street are factually correct. However, I wouldn't like to see walkers choosing Boongate over designated footpaths to either side of this street. Boongate bridge is no place for pedestrians nor cyclists (even if there is no sign preventing them to use it). Would you agree to revert the change?

Cześć,
Zastanawiam się, czy jest sens w dodawaniu pojedynczych chodników w obszarze Rynku. Praktycznie cały obszar jest wyłącznie dla ruchu pieszego (nie licząc służb porządkowych i dostaw) więc rysowanie niepołączonych chodników, choć wygląda ładnie jest mało praktyczne. Co powiesz na usunięcie tych chodników i przykładem Wrocławskiego rynku stworzenie: highway=pedestrian area=yes

relation/21981

I'll allow myself to revert Currys to the size it is, if you don't mind of course.

Hi GeoFens,
I think you reverted my changes to the Maskew retail park. My edits were based on guestimates as now more up to date aerial imagery is yet available but Currys is about half the size of Argos. New building sits where two closest parking alleys existed.

Hi Jeb,
I see you started with a rather large object. You've done a great job but I'd like to suggest couple of improvements.
If you replace somebodies work please check if any tags are accurate and could be reused. Previously Robert Whittaker used Building=school to clearly make it a school building, your object is just building=yes.
Where possible try to use "make square (S)" on buildings to make sure right angle corners are 90 degrees.
Finally if you know the site, add as much detail as possible. Paths, roads, fence, hedge, gates, play fields etc. That is valuable information not visible to sofa mappers like me :)

Hi christian138,
Thank you for adding new postcodes but I wonder if you could be a bit more specific as to where they should they apply.
I understand that there are two buildings (east/west) but your post codes are right in the middle. Also landuse is not the best tag for a point on a map.

to sie usmialem z komentarza :)

Are you sure they are streams? Shouldn't this be marked as an area - water?

Hi, are you sure that those are buildings:
way/796898964

Czesc,
node/4475469216 czy to w koncu jest Biedronka czy nie. Usunales kilka znacznikow, kilka zostalo jak (email i nazwa po rusku), nie mozliwe zeby to byla biedronka tylko dla rosjan :)

Hi, could you confirm that the below house is really under the service road?
way/822665527
same for this one:
way/822665525

Is this a service road or a drive going under a part of building? If so why not use this kind of tagging:
way/655683153