If they're fully "equal", then TPP mode gives you an advantage of a wider, onobstructed FOV. I think it should be like chase view in FS.
Though, if PGI really wants to make 3rd person the only available mode, I'd say let them. They'll finally go bankrupt and then we can have a proper MechWarrior game.
TBH, I've had enough with MWO. Broken promises, gameplay worse than MW2
, no singleplayer and blatant milking the players for cash. Even Living Legends was better, though they were also missing a campaign, at least that was a free mod and there was a (however slight) chance of somebody making an SP mode one day, this being a fan project on a flexible engine.