Web from spider form can be combined with another aoe, since it seems to be an ability and doesn't require concentration. I've been using spike growth > Shift spider > web a lot with my druid. Spike growth needs tweaking, though, because it's very easy to kill your party or neutral npcs after battle, as they just walk through it.
As for shapeshifting, I don't like the raven form. Moving around doesn't feel like your druid is flying, but rather like they are jumping around like an angry chicken. If there was no way to implement flying, they could have given the druid some other form with enhanced mobility.
