[Chaos]

The argument that they're heavy doesn't really stand. And, not being mobile doesn't either. Look at Soul Rage. "Contrary to their appearance, the Dullahan is capable of lightning fast rampages, due to the nature of the Soul Engine." They should at the absolute least be getting evasion while using soul rage.

Soul Rage is basically the Dullahan going berserk. People that go berserk aren't in the mindset of partial dodging, they're in the mindset of running up to the target and smashing their head in. They are 'lightning fast' in their approach, but not necessarily their defense.

Putting aside how Global Evasion and Heavy Armor shouldn't even mix in the first place (it's a mechanic for evasive characters, why can some seven-foot, four-hundred pound, steel-and-bone-covered tank utilize this?), this is nowhere near 'unfair'. If you want 'unfair', talk about how Interference/Soul Chains used to stunlock Dullahans for as long as the opponent could apply those effects.

If you somehow think that Dullahan, despite negating critical hits and poison, always triggering Heavy Armor benefits, getting to drain their FP to initiate stun (which carries 50% damage reduction) with the pontential to heal on said stun, with the ability to start turns with 10 Momentum at will, while completely ignoring the Battle Weight system, and can give the middle finger to any sort of FP attacking/DoT strategy out there, is somehow not naturally tanky enough, then I'm not sure what to tell you. I can think of no other race that can pull off this much tanking power just because they're X; everything else relies on what the rest of the game provides. Even Glykins, with all their regen, can't achieve the level of immovability that Dullahans can easily harness.

If you really want to talk about buffing Dullahan with Global Evasion, then you should start talking about nerfing some of its strengths first.