Had Epstein pressured the band to give Harrison more space on the albums and more room to release singles of songs he wrote, I think there would be a benefit. That would have meant less room for Lennon and McCartney, which means they would have to put the better material they had on the album, at least to the degree that Harrison would push their material out in this scenario. That would be a benefit in itself, as it would mean they have to bring their A game, but what it would also potentially mean is that Lennon and McCartney would be able to stew on material for a bit longer which they would otherwise release, and improve it, and it could also mean Lennon and McCartney merge together different song ideas one another has to get it on the album or because they don't have to fill up the albums as much and can really go to work on merging and/or improving the best elements.