Im not sure if 5 boxing is pointless, I think it comes down to the individual and what they are doing.
Im boxing, my 2nd team, lvl 88 some lvl 89, and loving soloin dungeons with my 1 blood dk, 1 disc priest, 2 ele shammys 1 mage, its fun for me, challenging to box dungeons myself, as I never did that in wrath or even cata at all.

Have not really bg'ed this xpac at all so far, used x2 hunters in normal raids, first 3bosses in MSV and first boss in HOF as we were 1 man short for our guild run a while ago, and so they asked me to bring my other hunter lol.

I was using 9 of my toons for inscripting DMF Cards but they arent worth much now and im back to G capped so I dont need gold atm, and just using my 2nd team for pure solo play, trying to clear dungeons as I level inbetween questing for fun and the challenge, beyond that, I have noidea what I Plan to do, maybe use tank or healer for raids, or play in BGS inbetween main raids...but for now x5 works for me. + my x4 hunters.