I think that's good bundle offer, £7.50 a game if you can make both every day, if you only want to watch the Devils games then it is what it is, the choice is yours but if you buy the bundle that's still only £15 per Devils game.
What you have to remember is Bronze seat game tickets for a league game are £18 so for a European cup game a £20 day ticket i think is a good price especially if you watch both games then it takes it down to £10 per game.
I myself think they got the pricing structure right.