Shining Charizard, especially, holds a tremendous amount of value to collectors
If you're looking to make Anowon even stronger through upgrades, I would suggest adding more powerful Rogues like Thada Adel, Acquisitor, more ways to generate value through combat like Knowledge Exploitation, and finally more ways to plunder our opponents' graveyards like Mnemonic Betrayal
Its second ability lets you create tokens that are copies of it, which can get out of hand very quickly
The deck then adds a number of 2- and 3- drop modular creatures, as well as 4 copies each of Steel Overseer and Arcbound Shikari, each of which can add +1/+1 counters to every creature on your team, and 4 copies of Tempered Steel to quickly make your cheaply-costed creatures enormously strong
Despite appearing to be somewhat weak competitively, Sab-Sunen, Luxa Embodied will work wonders in Commander