I totally agree. I loved Descent Road To Legend, and D2 butchered most of what made it great:
- Deep tactical combat was replaced by race for the objectives (granted, this was partially corrected in the expansions, and in Imperial Assault)
- The strategic decisions were removed (Overlord purchases, and lieutenant actions), and were replaced with a semi linear campaign.
What I hoped for was just a rebalance of Descent RTL (because there was indeed a runaway problem. The side that scored the most points early would become even stronger, making catching up harder and harder as time went), with some of the fiddliness removed (because there was a bit too many concurrent conditions).
Also internal balance (between heroes and overlord options) could have been improved (I still remember Talia or Nanok being much stronger than their competitors).
What made Descent great for me, was that in my group, playing overlord was something we all looked forward to.
I also like Coop crawlers, but the market is a bit crowded in this department these times, and they still feel more like "skinner boxes" than Descent ever did.