You doubled the number of hits required to charge their special shots, which are their main source of power, from 3 to 6. That's a MASSIVE nerf, and it hits them in the one part of their functionality that makes them exotic. Why would you do that? Honestly, they were stronger before, at least you could use their exotic functionality quite often. The tiny compensation buffs you gave them that added subclass verbs weren't nearly enough. As many people have suggested (myself included), the glaives need to gain 2 charges towards their special shot from projectile hits to make them on par with the way they used to work. Then these changes would actually be a buff. As it stands now, the exotic class glaives are weaker than they were before the Heresy changes (or rather the Heresy nerfs).