That's how I feel about the show (you've described it more eloquently than me). I'm a big fan of the Nolans' work but it seems like too much complexity for it's own sake, a good example is the terrible mess Lisa Joy made of her film Reminiscence.
Thanks for the review, unfortunately I was bored throughout S4 as the show had completely lost it's raison d'etre. I own Seasons 1-3 on 4k disc and they look superb, one of the very few shows to be released on the format.