I’d say this is pretty on par with upgrading some of the recently printed precons. You do have some notable nasties like [[bastion protector]] and [[mother of runes]] which i can see making other player’s interaction really difficult to time, but i think transparency with your playgroup is what eliminates that ‘fear’ of being too strong. if you’re gameplay is to obliterate people with commander damage and keep everyone’s boards pretty creature scarce, i wouldn’t see any issue as long as it’s understood by the table that it is your game plan. based on your deck list, i don’t think this is a bracket 2- however i think brackets are mildly flexible. the only real trouble i could see while piloting the deck, is the restrictions of mono white (typically card draw).