They should allow us to play 4 copies of this card in our deck.
3 isn't enough. Especially with karma cut around and when losing all your BEWD to it means instant lose.
Yeah. Really nice idea. Lets all have 5 infernity lancer, 5 floodgate, 5 solar recharge etc. Let the decks being just 4 cards in 5 multiples. Viva deck diversity.
The op "did" specify only for Blue Eyes White Dragon that is a casual vanilla with no effect and often bricks. Even if the limit is 4-5 for this one people are still likely to play either 3 or 2 copies of it instead.
Hence why it's the perfect >3 limit card.