Honestly i think OP Fans are overhyping Commanders too much
This Formula have been used by Oda for as long as i can remember
Everytime Villain get Stronger, his Commanders are stronger too but SHs are also improving ofc
We had Arlong and his Three Commanders & then Enel & his 4 Priests, then Doffy & his 3 Executives & now we have Kaido & his Calamities
Oda usually hypes these Commanders a little & show us that they are very strong but they usually are far from their Leader & don't expect them to be a Major Threat, they are basically just the Strongest of Henchmen, nothing that Special
Arlong's Trio were shown to destroy a Marine Ship very easily but later we saw Zoro easily defeating Hatchan even with Injury, Sanji one-shotting Kuroobi in Land & even Usopp defeated Chew, the real deal was Arlong himself
Check Enel's Priests, Satori was shown to be able to handle Luffy, Sanji & Usopp at same time, they were definitely introduced as very strong but look once the War started, Shura was fodderized by Wiper and was the first one out just like that, Gedatsu was defeated by Chopper who didn't even have enough courage to fight & Ohm who performed well compared to rest, he was defeated by a single attack from Zoro and the fight wasn't as difficult as the likes of Daz Bonez or Kaku
Same thing for Doffy's Executives, Diamante was defeated by Kyros with just pure Strength, Trebol was a joke compared to Law & Pica even though he had really dangerous DF, he was nowhere near Zoro's Level
Don't expect things to change, Enemies are getting Stronger but SHs & Allies too, the Formula still stands
Calamities can still lose to many Characters among Alliance, Kaido & BM are the only danger there, the rest can be taken care of
What i'm trying to say is that Villain Commanders aren't a Milestone that must be reached or above Luffy's Allies like the Main Villain,
In all the examples that i just gave, Villain's Commanders were already weaker than the Strongest Allies of Luffy, nothing will change here
The time when Oda really gives SHs a challenge & foes to surpass is when they fight a Team & it's the SHs who fight them, not Allies such as Baroques Works & CP-9 & most probably Blackbeard Pirates next, and this is the second Formula that Oda uses