Campaign is good, but that's it just good.
Do not try operations unless you have a full squad, if you try to play online, even with the updates, when you play with a random player they WILL get you all killed.
Eternal war is so hit and miss I'd personally miss.
As a casual player (literally have like 3 hours after work if I'm lucky) I'd avoid Eternal all together as you'll most likely spend a good 2 hours either in lobbies or running to the firefight to instantly be put into respawn cause sabre can't figure out that players in squads will absolutely kill the game for people trying to unwind after 10 hours of dealing with the public.
TLDR: Give this game another 2 years before sinking ANYTHING into it.