You make it sound as if the WR corps we have on the field right now was part of a master plan!
First of all Caldwell deserves a pat on the back, even with his early season drops, looking over his shoulder, missed route running miscues. He's been getting better and is our defacto #1 WR - NOT what the front office had planned for him by a longshot, but I'm glad we have him.
For that reason its difficult to compare Caldwell and Givens statistically. If we had a season where Givens was the defacto #1 and he was getting all the balls thrown to him that Caldwell is, that might be a different matter.
Beyond that, the team went into this season without adequately addressing WR even BEFORE the Deion Branch episode - indeed, having Branch hold out and be traded was NOT part of the pre-season plan.
Everyone understands this so let's not kid ourselves that this season is going as planned in the least. Leave it to the Patriots to make a silk purse from a sow's ear, covering up their weaknesses and making the most with what little they have, but WR is NOT a position of strength right now.
If it were, Watson would be open more often, and to a higher degree, picking up more yards after the catch. I'm glad Caldwell and Watson are stretching the field as much as they are - I'd call it adequate at best though - and an improved WR game would have a positive impact for TEs and RBs in the passing game, and would also open up the running game more.
So let's give the team and the front office some credit - but let's not insult ourselves by thinking this is all part of a master plan when everyone knows its not.