I actually meant 2.5, total radius being 5. For most monsters the effective max melee range is 3 yalms. The few that break this are indeed larger mobs (or at least camera weird like Dhalmel), but if it is something like a wyrm, you'd have your DDs on one leg with your tanks on the other... at least in terms of the old game.

Basically, you could hit most people meleeing a single mob if you're at its side. The only ones who'd possibly miss out would be those close to max distance within your frontal fan. If you bumped it up to 3/6, this would still happen in a fractional sense, but I don't think demanding some situational awareness of your melees is a bad thing. I know when I'm on THF, I always get mad at those who stand at max distance while I'm trying to land a TA.