myconv: So, who's used the Epic launcher and what was their experience with it? Or anything people have heard about it?
I would have imagined many people, even on here, if only for the freebies (some of which are insane). I'm personally using it quite often these days due to playing some current games I own there. Windows games on linux.
The actual client software is ok, though a bit heavy for my tastes. It does its job, and isn't trying to be Facebook for nerds like STeam. I don't actually use the client software anymore though, as explained below (legendary is what you're after).
myconv: Similarly the games, are the Epic games patched and packaged correctly most of the time?
Yes, no complaints there. Updates arrive on time and earlier than on GOG for example (especially for its offline installers). Just recently for example with Phoenix Point's update, just to name an example.
myconv: Can one get Epic launcher to easily run on Linux?
Arguably easier than GOG/Galaxy. This is because Galaxy on wine is very clunky and buggy still, so then you have to use offline installers. Which nobody in their right mind would use without some kind of 3rd party tool, like lgogdownloader (the best one imo). So then you basically use a 3rd party tool to download the games, use wine to install them, and use wine to play them. Ok, completely doable and feasible (I do it with my offline games like Witcher 3 and XCOM 2), but not exactly the most user friendly experience out there. Overall I've been very disappointed with my Linux gaming experience on GOG, the DRM free platform that should have made things easier. Yet hasn't.
EGS actually provides a similar experience with a 3rd party tool, legendary, an alternative CLI client for Epic Games. For the DRM-free games, you can play them offline completely fine. Otherwise you get access to cloud saves if you so wish by logging in when playing through it. ANd even if you don't use legendary, you can wine EGS and it works well so no need to fiddle with additional utilities and installers.
Of course there are no native Linux games to my knowledge on Epic, which is a negative. Still, this is a larger shift away from native games due to outstanding performance of Wine/Proton, and I won't really go into this too much here. Other than to say that the diminishing number and quality of native linux games has had little impact for my gaming experience.
Also, I think someone's trying to make a gui for legendary, Heroic (lol), not sure why to be honest. But more choice is of course better.