It's not like they are struggling without him. Guardiola has referenced him a couple of times this season when talking about Oscar Bobb, saying that Palmer wanted to leave for first team football, something he wasn't going to get at Manchester City this season. The fact that they got a high price (£40m) for the transfer probably means they won't lose too much sleep over it, that's the absolute most they'd get for someone who was a squad player with a ton of potential.