Worried my console is dying.

I do the same thing as well. I don't think it's an OCD thing as much as it is resourceful thinking. To me it's more of a detriment than a feature.

Alien stuttered a lot for me at certain places, other than that my console is in insta on mode and I don't have any issues as described above, but imdont use a lot of apps.

It also happens after just alot of gaming, apps use, etc without a formal hard reset. It's the same way with most computers and smart phones today. They have fancy features and apps that eat up so much resources and some never really quit when you tell the
mtoo that it just requires a hard reset to fix. If it were to continue after doing a hard reset, then I would check on that warranty soon.

Yeah, I don't trust instant on. I don't need my Xbox on 'sleep' mode all the time and while it's nice to say Xbox on, I can just turn it on with my controller. I unplug the power supply cord when I'm not using my Xbox.

I haven't had any stuttering in my games except for one checkpoint in AW where it was stuttering for 2 seconds or so.

Well it's still doing it on Magic 2015. I've read that there are issues like that on the ONE version.

I watched a Twitch feed with someone playing Sherlock Holmes on the PS4 and it did the same as mine on the same parts.

I hear Alien can also do this, though it doesn't happen to everyone.

Finally, I played Forza 5 and Killer Instinct and there was 0 frame rate issues with either game. I feel better knowing it's not my console. Instant mode was turned on so I disabled it.