Hmm yes, making it a DD wouldn't hurt one bit because pet jobs do not work like other DDs at all.
Like I said I don't see the need of an enfeebling class and a class/job dedicated to it would simply not work in this current system. The enfeebling system needs a huge overhaul before a class like that appears. Why do you want to force Summoner into a role that was never part of it anyway? Simply because it's first in the poll?
Like I said the poll won't have a huge influence in development because any class that's going to show up soon is already set in stone more or less.
Summoner and other mages have been mentioned by Yoshida himself months ago so they are all being planned/made at this point. If they're adding classes at 2.0's launch it won't be just one, you can be sure of that.