IMO they have made some mistakes and Halo 4 isn't the best in the series, but it's still a great shooter and a good Halo. It could have turned out much worse, so I don't understand why some people need to spin everything around in such horrible ways.
I'd disagree that its a good Halo, but completely agree that its a good shooter.
Halo is really the only game I play, pretty much at all. So to see such radical changes to the formula is always going to resonate louder with someone like myself.