i always thought that exotics should be set to a maximum of maybe 360 when compared to the legendary maximum of 335 giving exotics that little bit extra power when campared to a legendary class. yes they should still have that perk list that makes them original creations but certain parts should also be random so one exotic of the same type could be better or worse than your current one (if you already have it) if just to make it none build/situation specific like most exotics seem to be now.