I just enrolled in Premiere so I could try out Anthem... But holy shit, it includes a lot more games than I expected. Without buying them I can play all the Star Wars games (including Battlefront 2), the FIFA games (2016-2019), the Battlefield games, the Mass Effect games, the Dragon Age games, The Darksiders games... I mean, the list goes on and on.
It also looks like they are getting games added in there like They Are Billions, which I've wanted to play on Steam but it never goes low enough on sale to justify it.
I didn't think much of Origin prior to today, but I'm rather excited with the 100+ games I just got access to. Even if I don't own the games, $15 is well worth the cost to play whatever game I want to play in that library.