I'll be interested to see where they go with the franchise. The multiplayer has never been my personal kind of thing, but I always bought them for the SP (then co-op) back in the day, and the first few overall were really great stuff. Now I get that the MP is the big thing for most of you, but there's still a lot of people will be looking at it for the SP, and boy do they have a big problem there.

As mentioned in this thread, Me, Sparkles, Webbo and Franny did a full co-op run of Halo5's SP campaign a couple of weeks ago, and fuck me is it a dumpster fire of epic proportions. None of us had the faintest idea what the hell was going on at any point of the "story" and the levels were a sprawling, baffling mess. Switching between two completely different squads coming at the same story from different angles was an appalling idea that just didn't work at all, because it's a 1st person game, so I don't know what my character even looks like, and all the other characters look identical.
I came to finish the fight as Master Chef, but seemed to be playing the game as a random woman called Linda. Da fuk?
The levels are huge, full of fabulous looking art design, but don't stand looking at it them too long, or indeed get separated from your team, because the game in it's wisdom, will continually, and without any warning, warp you back to the vicinity of your team, even if you're in the midst of combat. Absolutely dreadful design decision.
I had no idea who the awful new enemies are, or who is actually fighting who, or what anyone is trying to achieve, and every so often they'd throw in something that was clearly designed as a hub area, but actually served no purpose whatsoever.
It's only blessing was that the shooty-shooty mechanics were still solid and fun, because, really it had nothing else going for it.

It's a game that reeks of troubled development, and rush release to meet deadlines, and MS are going to have to rethink the entire franchise if they want to get the casual shooter audience back on board.

Other thing that worries me about the franchise is whatever they do next, it's also going to have to run on current gen hardware. You think they'd maybe have looked at the original Destiny game which was hobbled by the same challenge and thought, maybe that's a bad idea.

So yup, going to be at the very least, interesting to see what they've come up with.