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Hydras are definitely better in the new version, in my opinion. Regeneration with that much initiative and HP is almost useless anyway. As it is, the enemy attacks the hydras, takes damage from the corrosive blood stream, and receives a regular counterattack. The main thing for mages is to prevent them from crafting artifacts. Otherwise, they'll put +20 initiative on their creatures, and it will be a problem.
Added 5 minutes later
And I still haven't been able to level up a Lucky Sorcerer... Before, you could get him almost immediately from Waisan. Now, you also need some stupid magic resistance and a dark ritual. I took all of that, but the Lucky Sorcerer still hasn't appeared. So, I'll have to manage without him...