[HoMM V]9 Race - Swamp! Is it needed?

Once again, all the creatures of the Fortress, along with their upgrades!
Level 1 - Troglodyte (attacks with spears, magic resistance (Blinding))!
Level 1 upgraded - Swamp Troglodyte (attacks with spears, magic resistance (Blinding, Slowing))!
Level 1 upgrade - Hell Troglodyte (attacks with spears, 1 fiery spear throw, magic resistance (Blinding, Slowing, Unholy Word))!
Level 2 - Lizard Archer (archer)!
Level 2 upgraded - Lizard Marksman (archer, poison shot)!
Level 2 upgrade - Lizard Master (archer, poison shot, shot that reduces movement range by 1)!

I haven't looked at the previous pages, so sorry if I'm repeating myself, but IMO, alternative upgrades should maintain the stability of the creatures or compensate, but not be so much stronger.