Because it is at a relatively high altitude, and thus, when everywhere else is VFR... Worcester is marginal or IFR, with its runways jutting into a cloud.
The earlier comment about flight plan filing is easy, drop in the mail is correct... if by that you mean e-mail...
To enter a flight plan, its as easy as pressing one key on an IPAD. To pick up or start a flight plan is easy as well... depart VFR if possible and radio in the air.... or a 2 minute (usually) phone call.
The only possible negative, among all the positives, of these closures is that some instrument approaches might change for the worse (ie, higher minimums). Due to being a non-tower, I’d surmise the procedures to getting a local barometric pressure might be a bit more remote, resulting in procedure changes... but this is so insignificant, compared to the savings of tax dollars.