I finished the campaign which was fun, but would have been 100 times more enjoyable if there was co-op. Once you’re done, there doesn’t seem to be anything to keep you playing.
I would like to see some in-world events like bosses or swarms. It would also be cool if the banished would occasionally retake FOBs so that you have something to do.
I hate to say it but there was more to do in vanilla Destiny, and that game was legendary for being sparse on content.
Done it twice on Legendary on 2 different accounts with 100% completion. There is NOTHING to make you go back again unless you want the achievements and cosmetics tied to a specific account.