From the reviews I have read (for me)...
Pros:
Lootboxes can basically be ignored
They have stepped up the difficulty in late game (the first game you were just too OP about 3/4 in the game).
Much more to do compared to 1st game
Cons:
Lootboxes may be tied to an ending or end game content
Same, uninteresting map
Nemesis system more confusing
Skill tree buried under pages of menus and unnecessarily complex
I am a huge fan of the first game and am having a hard time deciding how to buy.
I would prefer the Xbox One Gold digitally so I can take advantage of Play Anywhere and eventually the Xbox One X version.
But I will probably end up with PS4 Pro version from Best Buy (GCU) and grabbing a cheap Nvidia key at a later date.
BTW, there is an excellent Clueless Gamer (Conan) on YouTube with the guy from Silicon Valley playing the game. He voiced one of the Orcs and it is pretty funny.
https://www.youtube.com/watch?v=txvKrTplOVs&t=414s