With Flash Freeze, it might be possible to negate the loss of maelstrom stacks while mobbing. Otherwise, its a maelstrom boosted Jakobs. What more is there to say?
You can check out the boomacorn hype in the Nisha forums too. It’s gathering some attention there as well.
For anyone else, I would imagine its pretty meh. Maybe Claptrap can make some use out of it with OLT and ML if he doesn’t one shot everything. Otherwise, Wilhelm probably can’t do jack with it, Jack (unless he has a lot of money is power) probably wouldn’t excel with the gun either. Aurelia does have a bunch of base damage boosts, so maybe with Avalanche on top of wintertide it could be potent.