Well, i for one hope that regular forms will get stronger as we level up aswell ...
I really like my Bear, or Giant Badger ... and it would make me quite sad if their stats would be fix, so they would become useless in end game.

Make it polar bear > brown bear > black bear > whatever bear ... if you need to ...
Just keep in mind that there are people out there whos druids really dont want to turn into monstrosities.