That's a tad shortsighted, no? The argument has far less to do with perks than it does fairness.... Early war "objects" were def not as reinforced as they were in late war. As with the technology evolving in ordinance, so with reinforcement.
Seeing as the game parallels a WWII scenario you saying that early in the war they had weaker buildings (cause they are bombing towns here, no need to hit FH or VHs as nobody is upping against them) and such and as the war progressed they reinforced all those builds and that is why the strength of the ordnance was increased, I seeeee

A 250lb bomb is a 250lb bomb
I know, I know, this is a game, not the war

However the premise of the early war arena is the equipment is weaker than the late war arena. The planes carried less ordinance, and small values. The EW arena is a milk run arena already, by making it easier to to take out buildings and such your not going to increase the population in the arena, all your going to do is have the milk runners resetting the maps faster.