Does anyone think that the problems that were in the first Halo Wars will be solved or at least addressed in the new one? I never got the chance to play the first, but heard a lot of mixed reviews for it. Fill me in! 
It’s pretty unlikely that the problems (factual, not opinion-based problems) will remained unresolved in HW2.
Problems such as piss-poor unit pathfinding, numerous game-changing and abusable glitches from the first HW, should not end up being transferred to HW 2.
Balancing issues will always be an ongoing problem that is chased after with balance patches. It can’t be avoided.
What specific problems are you wondering about?