I don't really get why Larian distributed the forms the way they did.
On top of the bear form dire wolf and giant spider should also be moon druid specific as both are CR1. Access to stronger creatures is the entire point of the circle choice and yet the bear you get doesn't seem particularly more impressive in combat than the wolf or spider. Are the bonus spells worth bear form? I don't think so, to be honest. Invisibility, for example, is a waaaay more useful tool in your toolkit.
And yah, brown bear would've been fine. Though the polar bear doesn't seem equal to a CR2 creature, so they might've just done polar bear because it looks cooler.
Land druids should be limited to the Deep Rothe and the giant badger for their combat form needs. The giant badger is honestly pretty strong with its burrow ability so it isn't like land druids wouldn't have good options for fighting in wildshape when their spells run out or they wanna mix things up in melee.
