my general comment on the whole topic-
i havent watched the population numbers in some time. however, i watched them as closely (or more closely) as any coach for a solid year after the new engine came out. the simple reality is the d1 population numbers took a nose dive. d2 was either constant or there was a jump in usage (possibly resulting from reward point change for d2/d2). d1 population drop was amazingly severe. i compared it to every season ever, the natural ebb and flow of the game, and there is simply no doubt that the d1 drop was unprecedented.
you can argue why or why not that happened. but i don't think its fair to claim it didn't happen. i personally think it is silly to claim it was not related to the one and only gigantic change that happened just before the mass emigration from d1, but that is just my opinion :)
also, i think its very important to note that with the current scenario, a smart d1 mid major can somewhat compete with higher end bcs schools. i think its damn near impossible to have a consistent top 10 type program, but you can have a top 25 top team most years. however, if you add another 50 mid majors to d1, i think this gets harder and harder, and a smaller and smaller % of mid majors are able to compete. so the mass emigration from d1, regardless of the cause, really softens the blow of the d1 recruiting change with respect to mid majors and lower end bcs schools. but the current situation should not be the metric of what is acceptable and what is not. the metric of what d1 has been for most of the game, what i would consider the "desired state" if you will, should be used. and with 150 coaches per world, i think mid majors are screwed, plain and simple. and mid/low bcs schools for that matter. the days of getting mediocre recruits cheap and being able to fight hard against the bigger schools for 1-2 good recruits would be gone.
i recently had the experience of recruiting after signings. the players left were pretty damn bad, scouting every available recruit. you add 50 schools, or 150 signings, and you are going to have some really, really bad recruits being signed. forget messing up d1. the pillaging of d2 teams would be unprecedented as well, and would be a major disaster, IMO. until the pool of solid but not great recruits is bigger, its more or less impossible for this game to sustain the population we saw in d1 for the majority of this game.