My brother recently bought the gold version of ESO on Steam during the recent sale. However, I know that if a game has a dedicated launcher, it is (generally) best to go with that. I also know that there have been some hiccups with running ESO through Steam that didn't happen with the dedicated launcher.
So my question is, if I get him to use the launcher, will it function as if he bought it through the ESO site? Or will it still have ties to Steam, and potentially get the issues that the Steam version has? Another reason for using the launcher, is that I already have the files that I can just give to him to save time and downloads (Aus internet...).
On an unrelated note, I haven't actually been in-game since One Tamriel was announced (E3 last year). It'll be interesting to see what's changed.