Melee toons will face issues that ranged toons will not.
Specifically, being in melee range, which subjects you to cleaves or point-blank AoE spells.

Rogues like Ferals will eat a lot of crap, that Hunters or Elemental Shamans will not.
If your goals are specifically PvE, you might be better off with say Tank + Heals + 3x Balance (assuming a 5-box).

I like that Ferals can rez and battle-rez, which rogues cannot do.
Ferals also have the option to tank, or (via off-spec) to heal... ie., be a complete PvE team.
I like having Acquatic, Cat and Flight Forms in particular.

With my Ferals, I decided on Mangle spam instead of worrying about position for Shred.
My macro is essentially:
/castsequence reset=5 Mangle(Cat Form), Rake(Cat Form), Mangle(Cat Form), Mangle(Cat Form), Rip(Cat Form)
I have an IWT toggle set up, such that my spam key will also send IWT most of the time, but that can be disabled.

In pvp, they swarm a target.
In pve, after the initial run towards the target, the IWT toggle would be pressed to disable the swarming action.