Most likely is that Epic will eventually raise their commissions, or never reach feature parity with Steam. Steam's networking, workshop, et al aren't cheap to run.
To some extent this is intentional. Epic Game's market research culminated in a decision to include fewer social features, and less visual clutter than Steam.
Epic Games seems to be competing more on the back-end, offering better rates and licensing to developers in return for distribution exclusivity, rather than the front-end with features for users. That said, as a user, I appreciate the minimalism of EGS.
As an old fart, developer and gamer, I don't feel much sympathy for those who are wooed by intentional ignorance.
Personally, I will not buy products without reading user reviews; and I find that most professional reviews aren't worth the bandwidth to download.