Tetsujin
The Game Thread Dude
There really isn't a suitable backup for Cousins or Gay in that proposed situation. I imagine the thinking is you get a serviceable big man once you get all the talent. (like Blatche, who is EEEEEEEk suspect as all hell.)
Eh, Evans is a serviceable enough back up big (definitely not your ideal 5) and Acy is a solid effort guy. Certainly not a fearsome bench big group but not quite like the days when our big rotation was Burnt-out Brad Miller/Mikki Moore/Sheldon Williams/a dog turd.
And with Boogie and Smith eating up the majority of the minutes anyways, you don't exactly need a world breaker at the back up spot but instead a role player who plays D, rebounds, and gets the hell out of our good players' ways. Be it Reggie, Acy, Moreland, or some yet-to-be-acquired big man, we don't really need an offensive superpower back there.