Is that the badge of honor around here?
It isn't difficult to piss off Roland and Co. over there.
A commoner with a Warblades maneuver progression?
Tier 5. BAB actually really matters for the 5 Disciplines a Warblade gets, and they enjoy being able to max out Concentration.
A Fighter with a Full body
Tier 4 at most, assuming the Skill list is good.
A Warmage with a Full body
Probably up half a Tier, since BAB and Skill Points don't do as much for a Warmage buff-wise.
A Bard with a commoner body
Still Tier 3, but very much a Glass Cannon.
An unarmed sword sage with the commoner body
As with the Warblade, Tier 5.
A Duskblade with a commoner body
Tier 5. Duskblades are combat-oriented, and would not survive that kind of damage because their spell list is very limited.
An Adept with a Full Body
Tier 4, but it's close to Tier 3 at that point.
A Divine Mind with a Full bab
This actually exists.
A rogue with 2 skill points a level
Tier 5.
A rogue with commoner body + Rogue weapon list
Tier 6. You just went from useful in combat to dead last. Sneak Attack became meaningless for you, you lost out on all of those skills, and you have bare minimum HP.
Wild shape variant ranger with a Warriors body
So you lose out on Skill Points? That's it? Still Tier 3, but losing those skills left a noticeable scratch in the paint.
Psychic Warrior with the Wizards body
Same thing with the Duskblade: What you lost is what made the class combat-viable.
Healer with a Full Body and no code of conduct
The Spell List still wins out. It basically becomes a Paladin with 8+Int Skills and a decent number of healing spells.
Altering the body of the class has some impact on the Tier 3's and under, and the impact becomes more noticeable the lower you get. No class below Tier 2 enjoys having the Commoner's chasis, as it makes surviving much more WBL-oriented. THis turns the low levels into even bigger Rocket Tag.