I think having Ben live at the end would be quite ambitious and maybe beyond the scope of this edit, but if possible I’d like to see him appear beside Luke and Leia as a force ghost. It would require some FX work but doesn’t seem impossible considering what’s been accomplished in some of Hal’s other edits. I don’t feel that we get enough closure with his character in the theatrical cut.
While I personally wish Ben lived because a redeemed Ben Solo would make for some great stories. But I think it makes perfect sense for him to die. If Luke died using force projection and Leia died using force to speak to Kylo at the end (and possibly projecting Han as some people theorized), Ben should definitely die from using force revive. This should be the most taxing of all the force abilities.