No. Boston fans tend to get themselves all worked up over nothing. Terry has always been a bench player. Lee is a bench player. Barbosa is a bench player. Those three are pretty much redundant. That's not depth.
For our bigs we're weak. KG is excellent (though old), but beyond him we have two capable bench bigs (Sullinger and Bass) and a whole lot of trash.
Nothing has changed since Shaq hobbled off the court. We lack size next to KG. Our 4th best player is lighting it up on MIami's bench right now. But all of this was very predictable. I had us playing .500 ball until Feb. Give it until the trade deadline until you give up.
My biggest issues with this assessment are:
Jason Terry may have come off the bench for most of his career, but he is unquestionably a good starter level player.
Wilcox is a rotation level player. As a matter of fact, I would put him ahead of Sully at this stage of his career.
You forgot to mention Jeff Green. Yes, he's playing like crap right now, but he's an NBA starter level player who comes off the bench due to our depth.
And, of course, when Bradley (another starter level player) returns, we'll be even deeper.