So before I continue I feel the need to mention I am a massive RTS fan - I’ve been playing the most successful RTS since the 90’s StarCraft so I feel my points will be valid
So lets all be honest - the game is basically identical to Halo Wars 1, being some changes like building times & units - I struggled to find games near the middle of Halo Wars 1 life, the reason being people got bored of it because the game was so slow & you didn’t have the ability to be creative.
I got some Suggestion I’d like to make because I truly believe they would make Halo Wars 2 a lot more fun:
Halo Wars 2 is still in beta & 9 months (ish) away from being released so lets play with some things
Give the ability to build building where you want like StarCraft this ends in the game being more interesting because building put in certain locations can create fun games
for example being able to make more than Barracks at any single location without giving up supply meaning units will be everywhere & micro increases giving you something to do at all times, Halo Wars 1 I could take my hands off the controller mid game just cause.
Speed the production right up for Supply creates giving more money meaning we can make more tank units like the Scorpion or mass air army with Banshees & do keep in mind everything has a counter so nothing can truly be OP.
Keep the main building keeping the requirements to upgrade your bases.
I feel these changes will be extremely fun - Now I know some people will be worried about controlling everything with your controller - One RTS should be PC games Two a StarCraft Masters playing used a controller & smashed Keyboard & mouse players so ya 
If you agree like this post if you hate it abuse me <3