Xbox One X is the way to get the best graphics yes, best place to play overall depends on a lot of things so it's hard to push that message, especially when your "best place to play" console has the smallest installed base of any current console on the market and costs $500 to buy in and there are very few current big games that can only be played on any Xbox console at the moment. I get what you are saying but I don't think that message works beyond the hardcore xbox fan this late in the game.
Hardcore are who Microsoft should be working on. Not going to flip the generation but you want to win hardcore gamers trust as they usually lead the charge into new generations and drag their causal friends. I believe despite 360 leading most of last gen, Sony won back the hardcore late and it was at least a factor in their early gen momentum. Of course Mattrick threw a ton of gas on that fire.
I agree that there’s more than just performance for “best multiplats”. There’s older game enhancements, controllers and system features...all things Microsoft does well which hardcore gamers would eat up. Things like Elite Controller, LFG and demonstrations of enhancements of
older games could all be factors in where to buy multiplats.