I know this isn't a highly used glyph, but personally I love it - and use it for all sorts of things. With the nerf to KJC, the only filler ability a DA warlock is capable of using while moving is void ray - not ideal. Its other fillers are drain life, and soul fire.
So, I was thinking about the spec in general, and what I would fix if I could:
Really really wants / things I consider broken.
-taunt that works on boss-units (ie, not a 'provoke').
-filler usable while moving - even fel flame rather than void ray - in a perfect world, soulfire/drainlife while moving. Soulfire could be an interesting mechanic - it wouldn't be op in pvp, and would let you stack up charges to move, or take a +casttime hit. It does still cost fury - so it isn't a true filler, but you don't typically run short of fury unless you are aoe'ing.
If they were to make it a valid tank spec / probably not gona happen any time soon
-Ability to queue as tank :P
-pve crit immunity + being considered a tank for boss ability selection
-Vengence mechanic - less concerned about this, so long as we can taunt the boss, the utility is fine.
-Make its casttimes not negate avoidance - less of an issue as we would stack mitigation(mastery) rather than avoidance stats as a 'real' tank.
Any thoughts?