And if it is, that's even more reason to remove it. That way you can see what gets fallen back on in its absence and you know what needs adjusting when the next patch comes around.
You can't judge how well the faction can stand until you take the crutch away.
Yeah or we could not deliberately sabotage the game for some months just to watch what happens as the Axis factions crumble. Live playtesting is a valid strategy but only for finetuning and not for big changes, imo.
If tying call-ins to tech was as easy of a change as it appears on first glance I would've agreed and even pushed for to put it in the patch followed by minor rebalance changes to heavies afterwards. I'm sick of call-in meta too. But it's not an easy change, and it probably will require (other) big changes to get it right, so it isn't something I'd be willing to put into the game half-assed.