The automatic assumption here that this will be better is just silly - you don't lead in such categories that Moore and his offense did by being a bad playcaller. This is the NFL, if you are truly bad, you will be exposed by DCs in the league. These men have millions on the line to prove just that.
We could go downhill big time next year and it actually wouldn't be shocking. But I do think Moore would be bettered paired with a QB that has a big arm - him with Josh Allen or Herbert would be a good fit.