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I don't think the odds will decrease. Perhaps the tactics will change, but that's up to the player. Genies are more versatile than just illusionists. When there are enough of them, even a simple bolt will be more effective than various illusions.
Added 1 minute ago
In general, it seems that the mod didn't remove the imbalance at all, but simply wanted to make players hesitate more when choosing. So that it wouldn't be just 100% genies, vampires, cyclops, etc.

Барон "Vampires"
Отдай свои прошлые сны,
В сомненьях себя обрети,
В бешеном танце душа кружится!
Не думай, что будет потом,
Здесь и сейчас мы живем,
Стань хоть на миг сам собой, слышишь!