I have a 5 box pally group and it works fine in pvp. in fact I find it to be far easier than casters in some situations. boxing melle is not nearly as painful as most people belive and in many cases it is even more relaxing than playing casters I find.

The real legit problem, is pvp. There is, in my opinion, no real competitive option for a melle centric boxer in any pvp, except maybe open world ganking.

If follow did not break on melle hits and the follow distance was closer it could work, but that is simply not the case.

So if you care about pvp I would seriously consider not going 5 pallies, if you only want to do pve stuff rock on.