Que?
Delph said he'd stay a day or so before leaving (hence the snake name), Grealish did no such thing.
Jack is a villa boy, yes. Does that mean he does not have the right to have bigger ambitions? We can not offer him CL football now and have no guarantee for next season (we can hope for it though). Added to that, Grealish is a LOT better than Delph ever was, so he could actually go and do something in a team like that.
I want him to stay as much as anyone, but if the offer is correct, I wouldn't begrudge him the chance to play at a higher level. (Once we win the league we can buy him back to play CL for us) He got us back to the PL and kept us here in our first season. The man has done a lot for our club, I hope he will do more and get us into europe, but if he wants to go and the club gets a lot of money for him, good luck to him.