Reading through all these posts, seems like Engels has been written off by most. Yes, he had a run of poor games after starting very well, but considering the way we were playing as a team at the time and him adjusting I'd hardly say that half a dozen below-average performances and a long term injury are reason to believe he can't come good (again).
I'm going to go out on a limb here and say that the only defensive concerns for me are left-back and possibly goalkeeper, both of which aren't desperate. Let's not forget that players like Hause, Mings, Konsa are all now considered premier -league players after a year, and will be better players next season for the experience. Just have to look at the change in Douglas Luiz after he had time to reflect, settle-in and get up to speed....
We should be focused on another central, or left midfielder, and the front three positions. Get some players who can play with Grealish and McGinn further up the pitch....