I like it. We've brought in quality players and also there is a fresher, hungrier vibe about the club, at least it seems that way looking in.
I'm not too worried about the DM position. I have a feeling Endo is gonna be good there. But we also have other options - Mac, Thiago n Baj. Plus, looking at his stats, Grav can probably play there too. Out of all those options, I'd be amazed if Jürgen can't find a decent DM to see us through at least this season.
Basically, I think Grav n Endo look decent replacements for Hendo n Fab (and Milner), which is what we needed once they left. Meanwhile, Dom n Mac were already major upgrades on Keita n Ox. Plus they all have decent injury records. So our midfield is not just younger, but better, than it was.