Regarding glyphs, unlike with demo and destro, affliction seems to have 3 major glyphs that provide minor dps increases. This leaves it in a bit of a sticky spot regarding glyph of fear, without which fear loses a great deal of usability in raids and heroics, something that in the current environement is rather valuable.
The question is, which glyph is best to drop for it?
-Shadowbolt is a mana efficiency glyph, good in single target, long fight situations, reduces how often you need to tap, meaning more dps.
-Life tap is a time efficiency glyph, reduces the time taken per tap, again, only really noticable in long fights where you tap a reasonably large number of times (3-4 taps gets you a shadowbolt at reasonable haste levels)
-Soul swap is another time efficiency glyph, brings what would take 3 gcd's and brings it down to two. It saves 1-1.5 seconds when dotting multiple mobs,
At first glance, in my mind at least, soul swap is the clear loser, between the cooldown (currently at 10 seconds maybe going to 15) and the minimal gain (1.5 seconds every ~18-20) that you only really get on dual mob fights it just dosn't bring enough to the table to justify its spot when you compare it to the glyphs of life tap or shadowbolt for fights longer than ~3 minutes.
Bearing in mind that most of this is based on napkin math that I just did and that I'm only semi confident in, and that the dps gains/losses in question are both minimal and situational, anyone else have any thoughts?