Personnally i would also replace Priest of Forgotten Gods by Viscera Seer, i find the sacrifice 2 creature + tapping too restrictive
By doing so continuously, the player can keep the opponents aggression in check, save counter cards for more opportune moments, and buy more time to set up high-cost Character cards
After changes were made to planeswalkers to make them all legendary, you cannot run more than one Jace Beleren or other cards due to their legendary status, not due to any special rules, an you could now have multiple Jaces like Jace, Memory Adapt and Jace Belerenas long as they were different Jaces
Popular characters appear as new leader cards
Just like regular cards, misprints in better condition are worth more
Its worth noting they have a premium over other sleeves but the reputation is excellent