Thank you Wifidi. Well covered, sir!
Really excellent idea here. +1 big time.
I dont see how making T34/85 callin cheaper than it is now, after tier expense, would be a good thing.
It just makes tier units even less cost efficient than they are now, in comparison.
Same applies by that logic to all factions, tiers and callins.
Just makes the current tier unit vs callin cost inefficiency even more pronounced, than it already is.
In other words, makes the problem worse.
Also, it doesnt work for Ost in particular, which has a forced Battlephase upgrade cost, and leaves them extremely vulnerable between T1 or T2---T4 where you have to pay roughly half the difference anyways, with no actual benefit for skipping T3 (where the core armor resides).
Just doesnt work, man.
Would be abslutely stellar for Sov as a buff, but for every other faction it would be an enornous nerf.
You need to consider the fairness and position of other factions too, not just "what I want for my faction".