I voted no. Not because I think the call-in system is fine, but because I want another solution.
I love the ideas cruzz posted in his thread. Here are his ideas, mixed with some of mine:
1) Make call-in tanks require tech to call in.
2) For Germans, Pumas and STUGIIIEs should require BP2. Tigers and Elephants should require BP3.
3) All soviet call-in thanks should require either T3 or T4 to be build.
4) T34/85 changed to single call-in (the tech requirement would make it overly difficult to obtain these tanks when taking their performance into account).
At the moment I feel most call-in tanks (ISU/ele excluded..) are rather balanced for their price. However, because stock tanks are so expensive to tech to, there is no reason for soviets or germans to tech to T3/T4. You are just shooting yourself in the foot by teching to tanks. You can tech and get a single T34/76 / P4, or, you can spend the same amount of fuel OR LESS and get a vastly superior heavy tank.
With the tech-requirement for call-in tanks, a single T34/76 or P4 would no longer be more expensive than a IS-2 or Tiger. This would make the mid-game much more interesting than the 'spam infantry -> call in (heavy) tanks' 1v1 meta we have now.
I disagree. Current system is fine just need to make a limit, so if you want "fast" isu-152 you can skip t3/t4 but if you want to support it with other armor you should go t3/t4. As for now its like fast isu152 then another isu-152 and sometimes even the third one witch is stupid. And even with the require tech up its still will be t3/t4 and then 2-3 isu-152.