I get very few "failed" messages, and definitely not more on Ark than on any other planet. Seems to me if something works for one player and not for the other then the root of the problem can't be the server. Crappy home WiFi or crappy local ISP are more likely causes for those problems.
Since I've joined this game, this is the 3rd oratan event I seen so far, and the first one I had issues trying to go to some areas, like Quarry and it's surroundings. Even on sweat I had lag, also the drop has been poor for a couple of months.
These last days after the Big Crash the recurring lag (both loot lag and general in-world lag) got noticeably worse. Much more "Failed" messages as well... Hope they get it sorted soon.