A) Even if it did make the Pats "too easy to gameplan", the correct solution isn't geting rid of the player, the correct solution is changing your own gameplan to counteact this.
Maybe, but Brady will throw where Brady wants to throw. And when he has Amendola instead of Welker in the slot, he may be less inclined to go there. As great as TB12 is, there is clear favoritism in where he delivers the ball.
Not sure this is true as much as Welker is the read that is constantly open. Brady has his primary, secondary and sometimes tertiary reads and then checks down to the slot receiver. He does this amazingly fast, maybe faster than anyone in the league.
Welker is an elite, fantastic, amazing slot receiver knowing exactly how to properly find his place between the secondary and linebackers and stopping in the open spot. He's better at it than anyone. But he's thrown to so much because he is the safety valve on over 80% of the Pats throwing plays. And he is the primary read on probably the other percentage of plays.
Branch was that way for many years as well. Thing is it took years for Branch, Welker and Brady to develop that rhythm and trust and now that has to start over. If Amendola's hands are as good as his stats and he stays healthy, I think it will mitigate the loss of Welker.