Didn't want there to be an end-game build on them because:
- No stat recs and you get them at 21.
- Always need to be careful of crit immunity, especially with high ac. See Pale Master.
- They have some turn resistance, but having that huge vulnerability can be a huge problem. Rock, scissors, paper is ok to some extent, but don't want someone having that much buyer's remorse.
- History. Risen Lord was absolutely insane for years, it's still too soon

(It had crazy ac plus tons of extra damage.)
Thought they have some good party tricks, but that can be improved. Something fun, but not end-game viable, that was the point of the rd and vamp touch abilities.
ETA: I guess something that would fit in with my criteria would be making greater forms that unlock at shifter level 10 or 15 and would need the druid/shifter classes only (somewhat easy from dev side, design is always the headache there). Maybe lower turn resist or other things on the base form to allow some cheese headroom. Hope that a kukri dev crit dex form with ii doesn't break the bank...