Notice I said "at times." In his very limited action he made some really nice deep throws, a nice fade to Cooper in the endzone, and made some throws that Sims simply doesn't have the physical ability to make. Please don't make an ass of yourself - there's a reason that literally NO ONE was interested in Sims at the NFL level. Coker is a more physically gifted passer, plain and simple, and was last year.
I'm not hating on Sims. He had some unique abilities, and won the starting job fair & square, but he was probably one of the worst passing QBs we've had in a while, and could be completely ineffective and terrible at times