Absolutely.
And DE2 really doesn't feel like an open world game. When there's an alternate route into a building or room through an airduct, that airduct is almost always right next to the regular entrance. DE allowed you to pretty much explore an entire building through the airducts, in DE2, they are really short and awkwardly placed. Worse still, the entire Seattle-hub feels smaller than the UNATCO HQ in DE1. It doesn't hold a candle to Hells Kitchen, let alone the amazing hub that is Hong Kong.
One of my favorite silly moments right at the beginning of DE2, that highlights the terrible design, has to be the locked route to some elevator due to a chemical spill. The cops don't want civilians to enter that area, since they might get hurt by the poisonous fumes, so what do they do? They send out 2 patrolling drones with fucking machineguns, that shoot you on sight. And of course, they are conveniently evaded by crawling into an airduct that is literally next to the entrance door to the closed off area. The fucking chem-spill has a tighter security than the MJ12 base in DE

Then there's the cops with armed flying drones literally standing within earshot of gangbang muggers that accost you the moment you approach them.
DE's world was a very believable, breathing environment and exploring it was a lot of fun. I went out of my way to speak with everyone, read all newspapers, news-bulletins, books and datapads, that I could find. I also hacked into every computer and read every E-Mail. When I say DE had perfect worldbuilding, I mean it without the slightest hint of exageration.
Meanwhile, DE2 had worse atmosphere and it felt way too video-gamey.
I enjoyed DEHR a lot, it wasn't perfect, but it had its heart in the right place. I was insanely hostile before it came out. I thought it was a shitty cashgrab that will be a letdown like IW, but then the demo got leaked (intentionally, it seems), watched someone stream it. Downloaded it myself and played it... and I loved it. Again: Not perfect, but for me, it deserves the name Deus Ex.
Ironically, I think DEHR aged about as badly as IW. DEHR looked pretty neat when I first played it, now a lot of it looks kinda awkward, especially when it comes to character models.
Never played Mankind Divided (though I bought it during a sale), wonder how that'll fare.