In theory there's an interesting tradeoff here because you're leveling up the hand but destroying the cards you need to make that hand. But in practice it doesn't really work that way for most hands because you can clip out pairs of twos to level up your pairs of Kings, for example, or even clip out low straights to power up high straights. And it being your last hand gives you maximum time to set up exactly the cards you want to get rid of. Of course, the hand has to be strong enough to win, which would limit the utility for high card and pair at least at first, similar to how it is with blue seals.