Since 4.0, quite a few of my Companions are no longer able to equip the weapons i assigned them, some of which i had bought with Cartel Coins (i.e. real money). Worst offender in my opinion is the Cathar Warstaff, as discussed in this thread: http://www.swtor.com/community/showthread.php?t=842924.
This rather defeats the purpose of removing gear requirements in the first place. Now my Sith Warrior has a Warstaff she can't use (previously wielded by Jaesa), and an assault cannon (also from the Cartel Market) is gathering dust in my Vanguard's locker, since apparently Jorgan's arms have become too weak to lift it properly.
There's no coherence to these changes either. As a result of what seems to be arbitrary choices, some companions are better lucked regarding this issue than others (my Sgt Rusk still has his assault cannon, for instance). In any case, with companion gear requirements for combat gone, logic would dictate we have more cosmetic options for them than we used to, not less as it is the case here.