This is an aesthetic/practical flaw rather than a functional one:
I cast Praetor's Grasp exiling an opponent's card.
Then I can click on the face down card, which asks me to "look at the card? Y/N" - it's not obvious what to press to actually cast the card at this point, but one would assume that pressing Y (or alternatively, either option) would prompt me to do that afterwards. This is not the case, it's actually N that allows the user to cast the card.
After pressing N, I get asked whether I want to play the card. If I press N, the card doesn't get played. However if I press Y, I get asked the same question twice more. The answer for these extra questions doesn't matter, since the card goes on the stack asking to pay its cost regardless.
There definitely needs to be a change in how looking at face-down exiled cards works. It should essentially be as though it's just revealed. I'll take a look at how it's done for face-down creatures.
This is an aesthetic/practical flaw rather than a functional one: