There is certainly a lot to discover ...
But so far we dont have enough information to determine how inpactfull our choices will actualy be. :-/
On the contrary Grymforge showed us that there is quite high chance that Larian will still march us on the same road no matter wich side we will choose.
(If you help Tieflings and join Halsin ... you should preffer the way through Underdark, over the Shadowlands ... yet it prooved to be dead end, since it also only lead to Shadowlands and you need to return back and head toward mountain pass.)
I just hope that road will be different enough for both sides.
But there still is a lot of unused potential.
