If pawns of ultimate chess pieces were smaller, I would love it. That is one thing that bothers me when playing... pawns look crowded on the board. Also, ultimate pieces looks good on 2.375" square board, and little bit crowded on 2.25" one.
The Ultimates are made for blitz play. The pawns large tops make it ideal for quick grabbing and placing. The FIDE board is actually 5.5mm squares ~ 2.16". The Ultimates look fine on an actual 2.25" board.
Nice video man, you can also make it a little bit longer with the next set you would review. I like the design of championship design, but everyone says its very light, maybe they could be improved with some weight. Check upon my commentary video about Dubrovnik sets if you are interested