Patch 6 full update
Great news - after fully reinstalling the game, I've been able to properly test ImprovedUI for Patch 6.
ImprovedUI Assets is updated, which means that lockpicking/trap disarming is fixed:
I've reduced the overall file size whilst including more asset entries - proving that size really doesn't matter.
I've also updated ImprovedUI Dialogue - didn't need to but had unconfirmed reports of it not working, when it was still working for me.
Edit: ImprovedUI Assets fix for Controller - Equipped indicator now showing for Equipment (and containers with Stackable Items)