I didn't think so at all.
The peak of Halo's multiplayer success revolved around the Halo 3, and Reach era. So, they've been leaning into it really hard, as they should IMO. Having stuff like Slayer, Team Slayer, CTF, and Oddball alone is enough for it to carry a lot of folks for awhile. Along with new weapons, abilities, cosmetics, etc. I think folks will be good for awhile.
In terms of other modern games, especially from the perspective of this holiday season, there's nothing else like it in the realm of a "new" competitive FPS multiplayer. There's Infinite and 2042, which a lot of people will probably juggle at the same time much like they have in the past.
Master Chief Collection has been pretty busy for awhile now and that's with no new content. I think Infinite will do just fine. Unless it's horrible and it's all ruined, lmao.