Fair, Oda can easily solve this issue by making few of the VAs standout and giving them command & higher bounties.
Or by making them Zodiacs.
He already has done this during the timeskip and pre-skip
The VAs have been laid out as follows
1. Garp
2. Tsuru/Momousagi/Chaton (2 of them were Admiral candidates)
3. Onigumo (good feats vs Marco)
4. the group of VAs including Doberman (on Egghead), Comil, Strawberry, Yamakaji, Stainless, Momonga - basically the guys that did anything at Marineford
5. Dalmatian, Lacroix, John, Bastille, Cancer etc. - guys that were around at MF but did nothing of note
6. Maynard, Mozambia - the guys who got the role solely based on experience; their strength is below a lot of Rear Admirals
Smoker is unscalable right now but his PH performance would put him around that 5th level so im expecting 3 or 2 when we next see him
If I had to guess, Doberman's probably an opponent Jinbe would high diff while Zoro and Sanji would probably mid diff him and the guys on that level. The only VAs that are a problem these days are Onigumo, Momousagi, Chaton and Tsuru and only 1 of those 3 has the feats to back this up (was faster than Marco and strong enough to ragdoll him around, admittedly while Marco was in seastone cuffs, but still).