The answer to the OP question yes.
Time will tell what we have in Elisha Sam and I'm not one of those writing him off before he's even had chance to acclimatise, but he was never going to be a direct replacement for Kristian Dennis anyway. Whether Sam plays as a centre-forward or as an unusually big wide player, he's not going to replicate Kristian's 'fox in the box' qualities, and it's asking too much of young Knowles to do so either. He will probably be more suited to a supersub role.