I'm not sure Puritans is the path they'd want to go down, either. If Native American imagery isn't PC, I can't see how religion-based branding is any better.
Pioneers, I could live with. (Springfield is the metro center of the "Pioneer Valley" region of Massachusetts, for those unfamiliar.)
Falcons was an appropriate choice in '94, given the arrival of Peregrine Falcons downtown prior to the creation of the team. But that is not an option this time, for legal reasons. And it's just as well -- new team, fresh start.
There's some support in town for Tornados, given that the area just south of the arena was torn up by one, five years ago this month. (The MGM casino is part of the revitalization plan for that area.) My feeling is, why "celebrate" something that was destructive to the region? Rebuild and move on; don't dwell on it.
I just hope they choose an identity, colors, logo and uniform that is completely unrelated to the parent club, something that will be "evergreen" in the face of the affiliation carousel that independently-owned AHL teams deal with. No offense to the Panthers. And I like their new logo and unis -- I just don't want the "Springfield Panthers" or even a team with its own nickname simply using the same uniform as the parent club, given the temporary nature of such agreements.