For me, the best D&D rules system (particularly for computer games) will always be 3.X. I sorely miss the complexity of character creation, the superior rules for arms, armor and magical equipment, and more nuanced gameplay aspects like touch AC and Flat-Footed.
But at the end of the day, whether it's 5e, DnD Next, or 3.x, it's all just a medium for exploring the setting. I wouldn't care if the game was run off of GURPS as long as it captured what the Forgotten Realms means to me. Now whether or not Larian can do that remains to be seen, but I suspect the test will be more one of writing quality than whatever ruleset it uses-whether they can somehow reconcile the notion of a nostalgic throwback sequel to a 2e game with the radically, fundamentally changed setting they are setting the game in-I have my doubts, but I hope they can pull it off.
Yup. I'm the same on both your points.