0) The type change doesn't matter by 8th level. It can go or stay.
-1) No wings
-2) No bite & claw or +4 poison saves
-3) No darkvision or LLV
-4) No disease or poison immunities
-5) No DR
-6) No SR
The resistances have always bothered me. They are reversed: The highest [Good] level version shouldn't have the same resistances lowest [Good] one. They should be:
3rd level [Good] = Res10 acid, cold, elec (it's just this and eagle's splender)
6th level [Good] = Res10 acid, cold, elec (you won't need the above due to common item WBL)
8th level [Good] = Res20 acid, cold, elec
3rd level [Evil] = Res10 cold, fire (Team evil is behind)
6th level [Evil] = Res10 acid, cold, elec, fire (Team evil is ahead)
8th level [Evil] = Res20 cold, fire (still stacks with the below)