It has often overshoot, putting too many mechanics into sets (Dragons Maze, Battle for Zendikar) squeezing extra-complicated mechanics in alongside already full sets (Khans of Tarkir), and unnecessarily adding or replacing mechanics within a block (Eldritch Moon, Hour of Devastation)
Universes Beyond Fallout introduces a brand new - and very nuclear wasteland-appropriate - mechanic in the form of radiation and its associated radial counters
Age and shine are not value, the print and the condition are
Each is based on one of four games, with FF6, FF7, FF10, and FF14 all receiving the honour
One possible way is by making it easier to detect when a single buyer is making suspiciously large bulk purchases
A versatile card with a lovely illustration would make this a prize for any collector