The 43 zone keeps plays in front of the back seven. Its going to give up completions and yardage.
It needs a pass rush from its front 4, AND, runstopping from its front 4, or else the entire defense doesn't work.
And once the pass completion happens, the LBers and DBs have to be right on the receiver to make the tackle.
Its not a scheme issue. The Colts defense looks like a 43 zone defense that has no pass rush and average talent elsewhere.
Irsay and Ballard need to look long and hard at the evaluation of Frank Reich and this coaching staff. The decision to play Wentz when he was clearly not able to move at all in the pocket, is a huge concern on their decision making. Also, the decision to not have a better backup QB is affecting this team right now and that's on Ballard and Reich.
I think someone else needs to take over play calling. How does Taylor only get 10 carries, in a game where you are having success running the ball, are way behind in time of possession, and have an injured QB with limited mobility.
Also, we need to shuffle the WR depth chart, nobody besides Pittman seems to be getting open. During training camp we thought we had depth for days. I am ready to see someone prove they belong.