You might have ideas about declaring that Throwing Knives etc. at melee range should break stealth by default, and thus begin a hermit alchemist hunting season among Rogue enthusiasts. But, seriously, please don’t:
- It’s not like rogues are tanky in the first place, so having one or two non-stealth-breaking options for melee combat is far from making them op;
- For the same reason, with Mobility limiting them to light armor, being cornered into fighting in melee range is far from ideal and usually a punishment in itself. So...