There are two separate features named "Shibden Park" here, which means that the name appears twice on the map. They probably need combining:

way/910161905/history
way/36913964/history

There's also a separate node named "Shibden Estate" here which should perhaps be an alt_name tag on Shibden Park but I have no local knowledge and could be wrong.

node/361229184

The locations of traffic signals on this junction were a mess. I've tidied them up to the best of my knowledge in changeset/78785495 but this would still benefit from review by someone who knows the area well.

The car park at way/234077523 is tagged with the name "Gala Bingo". It is right next to way/234077517 which changed its name from "Gala Bingo" to "Buzz Bingo" in changeset/72852964 - I suspect the car park needs its name updating but haven't surveyed this.

There is a leisure=water%20park here at node/2896517133 that I'm fairly sure does not exist

The electric vehicle charging point at node/9380611791 is named "7 Kw" which looks like it violates osm.wiki/Names#Name_is_the_name_only

This charging point would benefit from a survey to assess which tags best suit it.

The steps mapped as way/1383823918 end closer to the footpath at way/1423926408 than currently mapped. Another footpath extends from the top of the steps joining up with a new footpath near way/1331473015 which may no longer follow its currently mapped route. The surface of the new footpath is considerably improved.

This would benefit from a survey to assess exactly what currently exists.

There are two leisure centres mapped here at way/316892937 and way/316892935 for the same leisure centre, violating osm.wiki/One_feature,_one_OSM_element

I suspect "Saddleworth Alpacas" mapped here as way/317114639 no longer exists.

I suspect the "Greenfield Shepherd Huts" mapped here at way/1055089321 no longer exists