The Bills don't need to worry about the cap until they need to pay a franchise QB. Taylor will probably get a nice restructuring with an extension, but, he won't command a huge price (in comparative terms).
The mistake was Hughes & Marcel based on the switch to Rex's defense. They are both players I have enjoyed watching but I don't believe that either is worth what they are getting paid based on what they are asked to do. At least we can say, IMO, that Hughes has gone balls out every game.