And you still haven't addressed the tech cost and timing problem you've created, unless the anvil/hammer at T1 will be 150/15, which then in turn create a timing problem of comet and churchill.
As I've said, you're creating a plethora of problems without solving anything.
With timing problem you mean those units would be produced too early or what?? and what do you mean with medium vehicles come too late? These changes would´nt delay anything