The NFL numbers carry a little bit of weight, but what's much more relevant for any conference is who are attending Division I football programs overall. Look at the number of Division I recruits by state from this year's National Signing Day from the same site that you've linked:
http://www.maxpreps.com/football-signing-day/football/home.htm
CT and MA produced 9 Division I recruits each from their entire state populations this year. RI, VT, NH and ME didn't produce a single Division I recruit. None of them. So, that's 18 Division I recruits signed this year from all of New England. The state of Kansas alone (with a fraction of the population and I mention it because KU could very well be a long-term Big Ten target) had 21. You can also see from that list why Rutgers and Maryland were added by the Big Ten - out of the "Northern" options available, they are actually very competitive in producing football talent (63 recruits from NJ and 48 from MD). NJ, MD and PA are basically where all of the football talent in the Northeast comes from, and now the Big Ten has all 3 of those states in its footprint.
It's also pretty clear from that list why Georgia Tech keeps coming up: the State of Georgia produced 184 Division I recruits. That is, the State of Georgia alone produced over 10 times as many football recruits as all of New England combined. Heck, a single high school in Georgia (Stephenson) produced 14 Division I recruits BY ITSELF in 2012. Only the much larger states of Texas, California and Florida produced more football talent in sheer numbers than Georgia.
There are several reasons why New England would provide value to a conference (namely TV markets and an affluent population), but the football recruiting numbers are simply awful when compared to the other targets people are discussing. There's no way around it. Contrast this with Rutgers and Maryland, which are both connected to large TV markets yet also bring a lot of value to the table in recruiting territories.