Do you really think that if power upgrades were possible for those stations, they wouldn't have been made at some point along the way?
WWFX upgraded as much as it could with its last move, which significantly improved its signal to the east almost all the way to 128. It is limited beyond that by several short spacings, including WQRC, WHEB and WZLX.
WORC-FM is even more limited by WBZ-FM and WPLM.