Will the new free to play omega changes be available on xbox one?

You can't delete a gamertag/profile. If you pay 800 Points to change the gamertag, the old one will be available for a new profile. You can change the Live ID to another email address (that's free), making the old one available for a new profile.

I submitted a review on there; thank you!

As for the free change, up until I actually submitted a new gamertag, it told me on the name change page that I had an available free one. It seems lots of other users are having this issue as well. Is there a reason we are all being told we have a free
one available and then being hit with a charge once we submit?

Based on your current GamerTag it doesn't look like a default one and seemed that you might have changed it the pat, and you don't remember. First change is free that's why you were able to do that for free.

You'll have to pay for the new one, and apparently "OmarGTR" is available.

There was an MMO Diablo Style RPG for a while that was available on Xbox One. It was called Marvel Heroes Omega and it was really fun. Unfortunately the servers closed on November 27th 2017.

The closest thing we have available now is Marvel Ultimate Alliance which is a great game as well.

I recommend you keep your Xbox 360 and get the Xbox One because you will not be able to download your old games for free it for free but you can still use the 360. If they do have downloads available for the old titles it may not be the same as playing it
on the 360. Fear not the main titles like Call Of Duty and Halo should have Live access despite the fact the systems change. Original Xbox games look slow when you play them on Xbox 360 so I would expect it to appear the same for the new system as well. So
keep the Xbox 360 even if you get the new one.