The only reason why anybody would hate anything is because that is what makes them fall... and nobody was actually 'good good' at Halo Wars to actually like it except a few select people... people who continue to play it today.
Bungie could careless about haters, they don't need you to preach about haters.
Thats why they gave the game to 343i. They grew detached because of all the complaining and let somebody else take over. The 'New guys'
I'm sure it would be easier if they made a Halo Wars 2.... but Rushes are easily countered by turrets and Scorpions if you are UNSC Sgt. Forge.
Infantry if Captain Cutter, followed by a disruption bomb, if it is a leader rush.
I would love to play in third person, although, the people who are used to and enjoy playing in First person may be furious, So as a few others may have suggested, Give us an option to do both, Third and First.
Well.... yeah they did upgrade the original Xboxs to the slim... So It should be able to handle it.
The smoothness of the gameplay also depends on the Engine of the game itself. Reach gets laggy at one point or another... but just rarely.
Ah yes... it will feel classic but with an entirely new experience... if that is even possible... it will be the same experience yet new, due to exceptional graphics and us replaying the campaign.