-Yes, there is a veteran ranking system. The rank levels are rookie, veteran (with one golden stripe) and elite (3 golden stripes). The elite units slowly renegerate their health and armor.
-There is no estimated date of when the game is coming out, but you can always see some progress in the weekly blogs.
-Yes, it will have superweapons, but not in the first release. At the moment, superweapons are planned to be in release 3.
-Yuri's forces as a separate team are not planned to be in at the moment, but Yuri himself as a soviet unit (as seen in red alert 2) should make an appearance in release 2.
-We still haven't worked totally out how the garrisoning system will work, so let it be a surprise when it's done
-You probably won't spawn in a garrisoned building unless it's a mission map or something similar.
-All Tech Buildings are planned to be in.
-As Yuri is release 2 stuff and we're currrently working on release 1 stuff, "it's still all up in the air" and I'm too lazy to type in the current plans.