Depends on the terminal.

C is great, B depends what time of day you are flying at.

A is a shitshow as it always is, but the new A opens up in like 2 weeks, and addresses all of the big issues with the existing A. I'd expect there to be kinks as it comes online like everything else, especially during the holidays (I really don't know why they didn't wait until the new year to switch).

Later next year once the new rental car facility is up and running, it should eliminate a bunch of other big complaints about EWR.

B & C need some upgrades to deal with lyft\uber pickups, its a pain in the ass right now when getting one, but not all of that is EWR's fault. I usually just spring for a car service on my return trip, its usually just a tiny bit more, you know the price for sure ahead of time, and so much better than rolling your dice with random ewr uber guy.

Edit: also i was in one of the new LGA terminals 2 weeks ago, and HOLY SHIT, did they knock that place out of the park. I honestly couldn't find something to complain about. Had I not just stepped off a plane that landed there, you wouldn't have been able to convince me it was laguardia.