Right now, all we can choose from for upgrades are Armor upgrades.
But what if there was a second choice? A powerplant upgrade. Now, I'm not thinking about getting a 2.5 X powerplant on all ships for 15 million, but something VERY costly, such as 100 million for each 0.1 times you want to add. (1.1 X powerplant = 100 Million, 1.2 X = 200 Million, etc.)
This, of course, would give brute power to many ships (especially for bombers) but at a cost: as soon as their shields get offline, only the Original hull remains. And they are a lot more vulnerable/easy to take down.
A boost of powerplant would be ideal for groups that needs to hit hard and fast, but useless if a battle goes on for too long.
During 1 on 1 with caps, the powerplant upgrade obviously have the advantage, but not in a groupfight.
Maybe I'm not clear enough, although. Language barrier, bleah.