The fallout from that banlist change is covered in the OP-15 meta tier list article linked below
+1/+1 counters are a common theme for R/G decks, and this is the sort of shenanigan that a fun Commander playgroup will approve of
White creatures with vigilance can attack and, in response to a potential removal spell at instant speed, can then be tapped to cast The Wandering Rescuer with flash, which then enables her to give them hexproof
The core gimmick of the deck is its item cards, which can be banished to trigger increasingly powerful effects on other cards
The list of Pocket Monsters that are at the base of the Charizard card currently includes Lapras, Blastoise, Gyarados, and Vaporeon
Marneus seems to be doing the right combination of things to be a great tokens commander for you to build around, and the perfect card to headline the Imperium deck