Exclusivity creates competition D. Which encourages each store front to be less of a lazy piece of shit like Steam has for the last decade.
It forces competition, as it forces somewhere to get the game from...as it's the only place in town to get said game.
Putting a game on every store lets gamers actually choose where to actually get the game. I want it to be on GOG, Steam, Epic, everywhere - this way, I can pick the one w/ either the best price and/or features.
When Epic actually has features worth a damn, which it currently doesn't and is way behind the competition (it's more so behind than Uplay, Origin, and even GOG), maybe things will get interesting for them.
Hell, there's no game-time tracking on Epic Store. All the other stores, who are also bare bones for the most part and not feature-rich like Steam, even have the time-tracking - Uplay (in some games, most of the newer ones got it), Origin, and even GOG.
Microsoft Store/XBox App for PC is currently garbage. It's right down there w/ the Epic Store.
While Epic is doing a great job of giving benefits to dev's and pub's (that 88/12 split is really good for dev's/pub's, as Epic's rolling in crazy Fortnite MTX money - and of course any extra cash they are tossing to dev's/pub's to become 1 year exclusives), it isn't doing anything for the consumer right now.