I will definitely purchase the game but I doubt seriously that I will play it for much more than the basic story line.
Pros:
Possible cross play = larger player base
Classes and skills look VERY similar to abilities and moves in d2
Graphics and terrain look AMAZEBALLS
Mounts will be a nice added feature.
Cons:
Possible micro transactions
Loot system might not be as good as d2
Only 3 classes introduced so far.
Worried that it may be another cash grab similar to the d3 nightmare.
PVP does not look very well rounded (Watched the video of a melee one piecing another toon and that worried me.