This is hard to balance of course, but I wish they found a way to make stealth viable and fun while not stupidly cheesy. Also "realistic" in the way nearby characters notice - as I understand, now it can be either "everyone in a large rowdy camp suddenly is aware an ally has been attacked" or "completely oblivious to allies dropping left and right just behind our backs".
I like the "silencing daggers/noisy big weapons" ideas, it would give an incentive to use stealthy weapons for stealth. The implementation would probably need to be messed around with, but the general idea seems good. As a bonus, it would make daggers not strictly inferior to rapiers as assassination weapons...