Roster does not suck at all.

-Punk should carry the strap, but is so big that he might have reached Cena "I don't need the title to be the man" levels.
-Daniel Bryan should be a star and is so over its ridiculous
-Ziggler should be a star
-Dean Ambrose deserves a big push.
-Cesaro and Wade Barrett deserve to be in the spotlight.
-Big Show is finally being used to his full potential. This character works, much like Mark Henry in 2011, speaking of which, Mark Henry is coming back.
-Sheamus, as much as he sucks as a character, is a beast in the ring and deserves to be a main eventer.

The roster isn't weak, the writing is just lazy. 12 month schedule, but Vince would rather sacrafice character building and pushing new guys for the short term buzz/dollars of a star studded Wrestlemania.