5 years ago, yes. These franchises (perhaps not Forza ...) are getting less and less interest. And userbase isn't the sole issue ... Halo and Gears did much better numbers on much smaller userbases. (I think Gears and Halo sold to like 25% - 30% of the low userbase first month when they came out, Halo and Gears are barely reaching 20% lifetime now ...
If Microsoft want any sort of future, they need to learn (no idea why they haven't already) that they need to put in some actual effort to get anywhere, their approach has been so arrogant. Give Halo a rest, give Gears a rest, heck give Forza a rest.
343 on a new RPG/FPS
Coalition on something totally new
Turn 10 on PGR
Playground on a Burnout style franchise
Rare on their old IP!
Create a couple new major studios, one focused on action/adventure and another on RPG, bring back a more mature and darker Fable.
I look back at this gen and can't believe how far they've fallen, and pretty much all of it could have been avoided.