Haven't played DX1 yet, I have played DX:HR. I'd say even DX:HR is quite a bit better than Bloodlines. Though I only played Bloodlines for 7 hours. :X
Wondering what people didn't like about HR. Aesthetically it was different, but still cool. Gameplay was great, stealth was excellent, weapons felt great. Good to great voice acting. Interesting story(though they dropped the ball in the end). The only real fault are the boss battles, but that's a small spec on an overall great game. Maybe the problem is that it didn't feel like a RPG?
It was a bit too consolized for my tastes, which wouldn't have been a problem if it wasn't in a series with the greatest game of all time in Deus Ex 1. The level design was smaller and simpler, there weren't nearly as many secret areas or well placed secrets and the map gave most everything away. The powers ruined the game about 60% of the way through because of the unbalanced XP system and it hurt the stealth in the game because the powers made it too easy. While the stealth was better than 1 it was still a sub par stealth game as a whole.
The overall gameplay was simplified too. No lockpicking, no skills, no ATMs to hack. Exploration was pretty weak and it boiled down to finding the locked door to hack or the vent in each and every room. It was a good game for modern standards but compared to Deus Ex 1 it fails.