With the expansion easily 6-7 months away, im not worried period. Never know what will/wont be dont to enfeebles between now and then. My only worry is that their enfeebles lists as "Unresistible" but if you are only taking a rdm for enfeebling, its a lazy rdm. Geo still at best will enfeeble as good as rdm, argueably better, possibly worse. Will heal worse, nuke about as well (I doubt 10 skill will make or break the nuking argument and if it does, their polarity+/rdm+gear+traits better match a rdm's fast cast values to compete...) and they lack the, admittedly neiche but existant melee ability rdm has. Also no telling if their buffs will have special effect types (Nature's Embrace for regen? North Wind for haste?) making them mesh. Lets not forget option of using either as subjob. As for events, Theres plenty jobs that are neglected or at best fringe for events. Not to mention, like i said, these could end up being "Loljobs".
If rdm is already dead as a doornail, then why fret about a new job to replace it? Especially if replacing the buffer role that many of us didnt want. Nin didnt rep us as enfeeblers, and neither have any of the others, the issue is more enfeebling isnt needed. So as far as im concerned, rdm is in no more danger from GEO than it is from DRG or MNK. And even as an enfeebler it seems like Geo's ability will be of select use as it seems their effects being aura based around either themselves, or a location planted on the field, any mob moving about on a rampage will be randomly enfeebled then freed then enfeebled again where as a rdm may be more suited to enfeebling a target like that (like ones with hate resets, which is like...everything now?) So at best i can see a rdm being a boss debuffer, and geo a fodder hoard debuffer.
Granted the jobs arent out, and they very will could dismantle whats left of rdm, but with atleast half a year to go, and lots of possible updates along the way, i think its pretty damn early for people to go be so "Doom-And-Gloom" already. Not to mention those fun tags they love to sling saying "Finished product may differ from depiction" or something to that effect.
Ill say it every time, Im not worried.
Edit: Besides, i dont know why you are all worried, the world is supposed to end at the end of the year anyway. I guess if people can believe that, i suppose i can see why you're all scared!