Eriksen, Martinez, De Jong (if he signs) and Malacia is a decent window. We've replaced outgoings with more quality (Eriksen and De Jong brings more to the table than Mata, Lingard and Pogba), and allows us to ship off the likes of Telles, Bailly, Axel and a couple others for some actual exciting talent.
My only worry is that we haven’t added any real quality in the first 11, but maybe ETH thinks there's enough quality to work with without having to bring any stars in, except for De Jong in midfield where we were crying out for some class.
Striker is definitely an area you'd be worried about if Ronaldo leaves (maybe even if he stays?). Is ETH placing faith in Martial? I think there's not many options out there that are better then him anyway, and available this window, so I wouldn't be against that course of action and wait for a proper talent like Osimhen to become available.
Attacking wise, we'll have Rashford, Sancho, Martial, Bruno and Elanga if Ronaldo leaves. Definitely looks a little light in terms of depth and goals. Feel like we probably need another versatile wide player with the ability to chip in with double figures throughout the season.