Which if you compare against the other units they're fighting of the same mark, you'll see that those specials scale relative.
So yes, a mark 5 fighter has 5 times more armor piercing, but the stuff it's normally firing at has five times more armor. Reclaiming going up is, again, necessary. A mark 1 unit with reclamation firing on a mark 4 unit is going to do diddly in terms of reclamation (1/8th normal) to the point of being detrimental (not as bad as it used to be, fortunately).
I'm not fighting considering same-mark units because same-mark unit balance will not be changed by changing caps. If 49 of one ships wins against 49 or another, 98 will win against 98 except in very rare cases. Also, because it happens rarely in the game either. A mark 3 planet can be assaulted with mark 4 ships.
The point I was making is that a higher cap of ships will making lower tier of ships less useful. 98 mark 3 ships are roughly as strong as 78 mark 3 + twice the mark 1 cap. now, I'm thinking of the power players could get with 30 more mark 4 ships... If this change is implemented on player side only, it will make the player considerably stronger, leading to other balance changes. Overall, the planet defenses will have to be boosted again, as will guard posts and reinforcements and so on.
The other thing that would change is the balance between caps. A full cap of mark 3 ships may now be as strong as 3 full caps of mark 2. If this change is done, you may need 4 full caps of mark 2 to fight the same threat (numbers are indicative to show a trend, not to be taken as truth). Given knowledge unlock costs, it might make it better (or even better ?) to specialize one unit to mark 3 instead of diversifying more units to mark 2. Which might or not make the game better (I think it will make it worse, but that's my opinion only).