I don't know if your still doing this, and I pray that you are, but as a primarily Druid player I have an opinion on a few of your suggested spells:
2nd Level
Alicorn Lance, for sure. That's a standard spell to use.
3rd Level
Spike Growth would be a great one. Another mod, SpellPack uses that, but it isn't very good. No, in fact, it's too good; along with good damage, it reduces movement speed for a full 24 hours even if you leave the area. I avoided using it there.
Quillfire is an interesting option. It can be done the way Thorn Spray is in SpellPack; it basically rapid-fires off darts at random baddies, more darts per level. They all did no more than 1-3 damage per dart, but it adds up - I can hit a single enemy with about 12, so your poison idea could work from that.
4th Level
Stone Growth. Eh, I'm also not in love. I've played IWD2, and it's basically a stronger, yet shorter lasting Spike Growth, with shorter radius. No point there
Thorn Spray. Now this was my favorite spell in IWD2. I pray that you decide to add this in the game, I really do, cone effect and all, even if it wasn't friendly-fireproof. Spellpack adds this in there, but eh, it's not too hot. . It's cool and all, but not the Thorn Spray I know and love.
Moonblade could be one that you didn't add. Spellpack offers it, and it's decent there, though I had to tweak it a bit to gain any use. Scambles magic when it hits, does decent damage, great against undead, and lasted one round per level, while also being enchanted. I love the idea of druids using magical elemental weapondry.
5th Level
Call Lightning Storm, I like it. That single random damage one is...cool, but I prefer a wider area of effect that can be used in tandem with Entangle.
Speaking of Entangle, I love how you made it more useful. My Druid is a plant user throughout, a Fighter/Druid of the forest. That said, at slightly higher levels, it's harder to effect things wiht it. I Near Infinitiy'd a -3 penalty for breath saves, and it seems to hit more often, without making it OP.
6th Level
Drown. Well, we do need more water based spells (suprised wizards get so few), but this seems difficult to implement.
7th Level
Poison Vines. Do it, man.
Would it be at all possible for you to add Animal Companions for Druids the way Wizards gain Familiars? I would love a litle hawk or bear I could send out to fight alongside me. It could make Magic Fang all the more useful.
