I think if Disney bought the SM rights in 2015, they would’ve done a more traditional take on the character, similar to YFNSM.

For me, it would’ve been the same movies, but I would have Spider-Man pops up in other NY-set projects:

Have him show up in TFATWS finale in a little cameo appearance.

Have him be in the Hawkeye finale, arriving too late to see the 30 Rock fight between the 2 Hawkeyes vs the Tracksuit Mafia.

He could be in M.O.M., helping Strange and Wong during the fight with Gargantos and thanking him.

He could’ve shown up in She-Hulk (like the OG plans).

Coogler is allowed to use Kraven in Black Panther, Norman Osborn to Iron Man, Tombstone, Hammerhead, The Maggia to Daredevil/The Punisher, Jessica Drew in The Marvels/Secret Invasion, Shocker as a minor foe to Ms. Marvel, etc.

In general, they would try to milk Spidey more as the face of Marvel instead of a supporting character, which is honestly a good thing.
How different would MCU Spider-Man be if Disney bought the rights in 2015 instead of making a deal with Sony?