you can only shoot 2 tentaclids ( such a bad word lol) a round, the crone won't live long enough to shoot all 4. Haruspex...you might have something there, I'll need to see it on the board before I change me tune of no go. As far as the Haruspex drawing fire, I believe that fire magnets can be cheaper and just as effective. Hive guard, meh again for me. Exocrine...you might have something there too, but my knee jerk is no. There is way too much out there that can shoot them down without breaking a sweat.
You are the master and I am the padawan but I'm just not convinced those news units are very good. I think a brutal mix of swarm, MC and buffs may be the way.
I misread the spore mine rules, the Fast Attack Spore Mine Clusters can be the business, but the biovore shots.....yeah, not so much.