Lots of great songs scored under 8 already tho
Raise The Sun and The Longest River by Anciients, Sankarihauta by Moonsorrow, Beginnings by Chicago, Cotard by Hirsch Effekt, Gates Of Babylon by Rainbow, Deep Channel by Afro Celt Sound System, etc..
I just feel obliged to name one or more cons, even if they're ever so slightly, just to give the player a helping hand, something to be wary of when sending the next song maybe.
But in the end of course no one wants to get straight 7.5's with the only saving grace being that "I liked them", we all want to win these things