This has brought my attention since I noticed a lot of people on here see the Smoke Fruit as a weak Logia which seems absurd to me.
Imho, Smoker just isn't using his fruit to its fullest potential.
In theory, the Smoke fruit should overlap slightly with the Gasu Gasu no Mi since Smoker should be filling rooms with Smoke like CC was doing.
He should be filling areas with clouds of smoke creating difficult breathing for people like how Aokiji can make cliffs of Ice.
And obviously the clouds of Smoke aren't connected to Smoker just like Aokiji isn't connected to the cliffs of Ice he creates or the road of Ice he makes on the sea.
It disappoints me people have confused Enel's specific move of becoming a massive Lightning entity, with it being customary for all Logia's to suffer from when they create mass amounts of the Logia ability.
The same way if you destroy one of Akainu's raining fists of pure magma, it won't harm Akainu himself.
Considering Smoker became a Vice-Admiral at 36 with the standard Haki, I personally think that's when the 3 Admirals became Vice-Admirals too (Kizaru, Aokiji & Akainu). I think they all reached Vice-Admiral in their mid-30s.
I wouldn't be surprised if Smoker is improving at a similar rate to them. since he has gone from zero to hero it seems.
From Oda's words in the SBS he says Oda and Tashigi reached their rank really quickly, implying they entered not that long from the start of the story, meaning Smoker has reached VA in not too many years and a lot faster than most.
Similar to how Coby has rapidly speeded up the ranks.
Smoker through the use of clouds has shown he can fly, so he should by a few years be able to be flying from island to island.
Honestly, the Smoke Fruit's capabilities are huge.
It's worthy of someone being an Admiral in the future.