The only unfortunate thing is the lack of powerful Vehicles in the Standard format right now
Avenger of Zendikar Another Commander staple, Avenger of Zendikar gets you a bunch of plant tokens as soon as it comes into play and buffs them with every land you play after
As a result, it's been designed with a lower power level than past UB products, which were built either for Commander or Modern
Whereas the Amethyst/Steel deck is all about Illusions and magic, this deck is more about using (and discarding) Items in order to make Lore gains and lower Cost
However, it's not just his ability to proliferate that makes him a good Commander
I feel the proliferation after moving the counters makes it difficult to spread shield or flying counters, for example, across multiple units