Underrail is definitely the best game of 2015 for me, yes. But WL2 wasn't all that bad.
Of course. The negativity you're talking about only exists on forums like these. Even in cRPG circles sites like the Codex and NMA are considered to be filled by whiny, elitist neckbeards. Rightfully so, I might add. This isn't a bad thing, but seriously, we do whine a lot about trivialities. Look at this thread for example. We've already damned WL3 for catering to console kiddies, dumbing down, going the F4 path and whatnot without ever seeing any in-game footage at all, let alone playing the game, or having any real information AT ALL. Also, don't expect the rest of the internet to agree with the general consensus here. While we tend to over-criticise any RPG release to death, including Wasteland 2, the metascore for that game is still a solid 81/100. That probably means it's a pretty decent (or perhaps even GOOD) game that people tend to enjoy.
Don't get me wrong, I like NMA, its people and its opinions, but I like to keep in mind that we're a special bunch, with special needs and expectations when it comes to games and especially RPG's. Most people don't care as much about the details in a game as we do, so don't expect the gaming industry to cater to our very specific needs, and don't condemn a game as soon as it promises features that we aren't used to. I think most people who played WL2 are pretty stoked about a sequel and would be willing to pay for that too.
We'll see how it turns out. It could be good, it could be bad, but either way, I'm looking forward to it.