I've noticed an odd quirk with the use traps skill. Heavy investment beyond max ranks and a good dex score does very little. Epic Skill focus: set trap and set trap on gear really only increases the detect and disable DCs. This has zero effect on PVE content and a trivial effect on PVP content in practice, as people who are concerned with PVP don't tend to do much with gear repated to the Search skill (compared to spot and listen for example).
Oddly, taking gruesome technique and gearing for Intimidate does more for a trapper than going all in with Use Traps. Gruesome technique is cool, and it's fine as is. But in my opinion there should be a space for charactera who want to go hog wild with Use Traps.
The suggestion:
+1 damage from traps per 5 soft ranks in Use Traps
+1 Round trip effect durrations (stun, blind, etc.) and +10 damage from traps from the Epic Skill focus: Use Traps feat