Queen 2011 remasters.

ive purchased couple of queen remasters thinking the sound would be better. they sound worse, in my opinion. queen greatest hits 1 still has some very noticeable back ground hiss. im aware these recording are very old now, but i wonder what limits them being cleaned up to modern recording standards. anyone got an opinion on them?
Greatest hits packages often use low generation masters...try a full lp...the Game or NOTWorld