A Linux Client to download Marketplace Assets OR a sane API to handle logins to the marketplace (currently 3rd party tools have to mess with the captcha service used to handle logins, fake a browser client and hope that nothing breaks the login procedure (which happens quit a lot as the captcha workarounds aren’t reliable)
It’s really nice to have an Engine which supports Linux at all, but being cut out of the Marketplace is something which can’t be in the interest of Epic)