I think that the main reason this game is as good as it is (which is not good) is that they didn't bother to make a new engine from scratch and tried to build on top of the dos engine instead. And it just works poorly for a dnd5 game.
Second reason is that they're inprinting too much of themeselves into the game instead of neutrally realizing the fine system and world that already exist. DnD and Forgotten Realms in particular have character (strong and recognizable), you don't have to bring yours to make it alive/interesting, it's already there. You just mess the things up.
Boo!!! Can't we have one positive thread without having criticisms that aren't relevant to the points being made being interjected? There are plenty of other critical threads, and I have plenty of my own criticisms of the game, but it would be lovely to have at least the odd thread where we can unabashedly share what we enjoy about the game.
EDIT: Of course, you are very welcome to start a thread about why the game is as bad as it is, and I'd promise not to post in that about how the game is great actually!
