The scabbards already landed the same hit that Oden landed. It would be weird imo if the Scabbards were to start doing even better
No it isn't. We've seen P1's Hybrid form, and Oda still goes in and out of Full Zooan. You can't even make the "best for last" argument here.
Dukes trashed Jack's Zoan back in Zou, couldnt trash his base. P1's hybrid is the best combat suited form, no doubt.
It's iron rule - Hybrid>Base>Zoan. There are exceptions, trash like Orochi is weakest in his base but proper combatants are not.