1) Encourages use of tier armor as you are not fuel starved.
or just encourages floating mp. right now people spam fuel caches to get heavy tanks. with your system, they no longer need fuel caches and just turn that mp into tanks.
2) Paying 1000-1200mp for IS or Tiger makes you think twice if you really want to get it over stock armor or even afford yourself that mp float. It would help seal the deal, not make a comeback.
first of all, thats closer to a 100% increase in mp. considering 1 fuel = 5 mp, your heavy tanks would now cost like 100-120 fuel. otherwise your suggestion is basically making heavy tanks very overpriced in order to nerf them. that makes them similar in fuel cost to cheap medium tanks. youre not exactly promoting medium tanks as much as placing heavies out of reach in close games.
3) If you are pushed back there is rather low chance that you can float this much menpower to make a comeback relying on heavy tank.
romeo beat me to it, but, tiger ace begs to differ.
Because even if you tie call-ins to tier buildings, people will just get tier building and forget about it, spamming call-ins. This will solve absolutely nothing, all it will make is increase first call-in arrival(because tiering gives hefty CP amount) and stall 2nd one by a 3-5 minutes.
which is why i think they should be tied to call ins AND have a cp increase.
Like the tiger ace, which everybody knows is totally balanced.
which atleast has a huge impact on your economy and isnt significantly better than a vet 3 tiger after all its nerfs.