We’ve made a change for 4.5 which will make FName case-preserving for the editor and UHT. This should address the FName case issues you’ve been seeing.
I’ve checked that you’re able to rename asset, actor, and blueprint components in a way that changes only their case. I’ve also tested that you’re able to have a variables in different UObject/UStruct types that vary only by case, and that the UHT will generate code that actually compiles.