Reestablish the flame tower from red alert 1 for the soviets since the Allies have been restored with gun turret.
(Flame towers should deal splash damage).
This logic you follow is not correct. The early game anti infantry defence slot is already occupied by the Sentries, while the Gun Turrets were added to fill a fuction, which is countering vehicles in early game.
Maybe in the future would be interesting to see it as a faction specific replacement, but I think that an early game AoE defence could be OP.
Sentries cant deal with scorpion cell and confederation mass attacks because of the relative cost of time and money.And the mentalmeisters are recognized for tactical complexity and forcing player in tougher scenarios than red alert 2
And yes tier 2 and 3 is the best idea to implement this defensive structure.
And the fact that allies get gun turret at tier 1 makes the whole tier 1 armour useless against allies who can just hold chokepoints or wall themselves in with G.I's.