If he denied a goalscoring opportunity yeah, but given it went in he only deserves a booking.
Dont agree, if it's a red card offence then the ball going in is irrelevent, if thats and outfield player in the centre of the field then thats a clear red.
Also it wasn't a corner but if you look at it in real time its difficult, it was only on a slow motion replay that it became clear it didnt touch the hull player.
To say to quality of play has been pretty poor its actually a quite exciting cup final for a change.