I personally couldn't give two shits about which installer I'd have to use in order to play the game I supported on kickstarter and I don't get why other people care.

If the developer gets more money from Epic, that means that they now have more resources to make a decent game, which actually benefits me as a consumer.

Also, if the game is good, I'd prefer more money to make its way to the developer rather than storefront and Epic has a better deal.

From all above it seems to me that Epic Store is overall doing a good thing and I'd prefer it to Steam if I had a choice.