Meh, I thought the second would have been a great movie if it was 20-30 minutes shorter. My god some of those scenes drag on.
The first was ground breaking for its time. I don't think it is nostalgia (although there is probably some) so much as context. A lot of the things that had people's jaws on the floor are commonplace now. It's hard to recreate that illusion especially if you're comparing it to modern movies.
Except for it being called Blade Runner and not striking any resemblance to the original.
If it came out as it's own thing I would have called it a good movie, although a bit bland and with poorly written characters, but as a sequel to Blade Runner, no way.