Maybe a couple of simple user changes:
For something more substantial, maybe one converted to use early anti-tank missiles?
The Australian Army trialled an M24 at the end of WWII, along with an M4 Sherman. They found the M24 was too light for use in Jungle and the M4 while suitable, offered no real advantage over the M3 Grant/Lees they were already operating. Instead they opted for the Churchill, receiving 200 just post war.
I've always wondered where the 200 went. They seem to have been disposed off when the Centurions arrived, after having been placed almost immediately into storage when they arrived themselves. Scrapping them would have been a monster of a job, cutting up six-inch thick armour isn't something most scrap yards could do then.