But you cannot deny that Midgar is a tiny portion of the original 1997 release.
When we both compare it to the original of course you're right. Obviously I understand we both see this from different perspectives and when the game was first announced in at least 3 parts the overwhelming majority were unhappy with this including me. I had the same take as you.
But then we had the reasons why, and for me personally when I was a kid I use to think of the original and wish they fleshed out Zacks story or had more content after you saw the video of Cloud and Zack escape Nibelheim or added more to here and there and so much more. With Remake we had the Yuffie DLC that did exactly that, and remake expanded on so much more, Biggs, Wedge and Jessie you care much more about in remake compared to the original due to this.
I guess what I'm saying, is that you should play through it yourself, you might feel differently. I'm not saying you won't fundamentally change your mind, but I do think you'll appreciate some of remake.
A youtube channel called Final Fantasy Union recently polled it's viewers asking if they would rather the parts come out sooner or wait longer for Squaresoft to fully flesh out the next instalments, over 80% would prefer we get more content whilst waiting longer. Remake really has some great things, as well as bad some of which you've mentioned. It's not perfect for a number of reasons, but it excels in other areas.