I really hope Comcast at least partially reverses some of these drops, or else they're probably going to lose some subscribers in Bristol County and NH's Upper Valley. In Bristol County's case, even though it is part of the Providence metro area for Census purposes, the majority of the county (save for the I-195 corridor in the south) is Boston through and through. And none of the Burlington stations cover NH very much, if at all.
It is also worth noting that in significant parts of Pennsylvania, Delaware and Maryland, they're dropping WGAL and WBAL so that viewers will be forced to watch NBC on O&Os WCAU and WRC. You can't tell me that wasn't a factor.