I dunno, honestly that sounds like you have no real interest in a new show, but want something exactly like the original. We know that's not going to happen ever, E7AO is a new series about new characters and a new world. It happens to also involve the son of Eureka and Renton, and serves as a follow up to the themes and universe of the original series while telling a brand new story. If you don't like that, well, it can't be helped I guess.
I wouldn't have minded if it fleshed out other aspects of the world or even worked as a prequel. The problem here is something similar to Prometheus where it wants to tie into the original mythos but goes about the most scenic/roundabout way of doing it, to the point of confusing the hell out of the viewer. Either you go all-in or you go home. In this case, it feels relatively in-between. Part of the problem is with the writing in that there are way too many plot twists in the show, to the point of there being twists on top of the twists. An alternate timeline and trying to get back would be enough for most series, inside we have five major parties all vying for different things along with a few minor ones, (Naru who wants to protect the Scub Coral, Ao who wants to stay/meet with his mom, Gen Blue who wants to protect people, Big Blue World who are doing their own secretive things, the Japanese who want power I guess, the Americans who want Ao and his mech, Truth who wants to change the world, and the Secrets who want to destroy the quartz), on top of the already existing mythos. This definitely feels like a better executed Xam'd but still having the same fundamental issue in that they're trying to cram too many plot points into way too small of a window and the pacing feels completely out of whack. This then is hurting the character development as the show has less time to really focus and develop the characters, so of whom are really good. If they just eliminated the E7 part of the show, I think it would have served to simplify the jumbled mess that it currently is. I think it would be better as a work (and probably better received critically and sales-wise) if it had just been a completely new IP.
As you put it E7AO is about a brand new world but why should we as the audience care when we are repeatedly told this is the wrong universe? This also ties into our expectations that we want to go back to the original universe, which is why we're watching the sequel in the first place. However we're 17 episodes in and have no clue how Ao is going back to the proper timeline or even if he will. What I keep coming back to is essentially, why does this exist? I'm not talking about financial reasons, in that BONES wants money. How does this work flesh out the E7 mythos/universe? In fact so far it seems like it's making the mythos a jumbled goddamn mess.
I want to like this show as a whole, I really do. However it feels wanting both as a stand-alone series and as a proper sequel.