It’s wrong logic lol. I guess Smoker = Aokiji too now since Ace = Smoker.
No because it was filler not manga canon. And no again because I'm talking about DF not users. There is absolute no problem if Smoker DF would be as strong as Ace DF.
Also, Oda even said Akainu DF was the most offensive of OP. Whatever that means, is something to take in consideration. DF does increase people power(or decrease)
Take BB for example, his "Logia"(is not a Logia but Paramecia) was suppose to nerf him (joke right?) imagine BB without that "nerf" he would tank even more damage.
What about Zoans, specially Ancient and Mythical Zoans. Marco tanks a lot because of his DF, King and Queen too.