Its ability means that Commander cards will get double the amount of tokens and counters as they normally would
One convenient piece of math that pops to mind is Modern Ad Nauseam
Each Commander Masters Commander Deck set includes 1 ready-to-play deck of 100 Magic cards (2 Traditional Foil Legendary Creature cards, 98 nonfoil cards), a 2-card Collector Booster Sample Pack, 1 foil-etched Display Commander (a thick cardstock copy of the commander card with foil etched into the cards border and art), 10 double-sided tokens, 1 deck box (can hold 100 sleeved cards), 1 Life Wheel, 1 strategy insert, and 1 reference card
Kyloxs haste, ward, and menace make it harder to answer and block
One card to watch out for in pushing a new tribal direction is Plague Engineer, but I dont think its going to be all that problematic for most decks
Something along the line of a scannable code on cards to verify authenticity would get the job done, but implementing the program would be costly, and it wouldn't help with all the cards that are currently in print (barring some sort of mass-exchange program, which would be even more prohibitively expensive)