Giving the animal forms the caster's AC would obliterate class balance. Druid would be basically unkillable. The low AC is there to balance the massive amount of HP they get.
The real problem is that Moonbeam and other concentration spells aren't working right in animal form. You're supposed to be able to move your moonbeam around in beast form. Not being able to do so is, I assume, a bug.
And that is how the druid is supposed to play. You don't just turn into a bear and maul things and forget about your spells. You strategically use your spells before and after you take on animal form and use the times you get knocked out of form to re-cast them when your concentration breaks. Moon druid is still a full caster. Your beast forms are there to add layers of protection while your spells wreak havoc, not to be your main source of damage.
Giving bear form its multi-attack back would also be nice. I actually wonder if Larian tweaked the rules so that druids unlock multi-attack at level 5 when other melee get their second attack to make the druid's power curve less ridiculous at levels 2-4 compared to everyone else, which wouldn't be the worst idea to be honest.
Class balance in general is hard to discuss when we don't know what other changes Larian might have at higher levels.
Last edited by SaurianDruid; 09/03/21 02:22 AM.