[Lurker37]

But which are minor? With two distinct tiers of Glyphs we need to know which are which or there's a danger we'll end up comparing a minor glyph with a major one.

The only thing I can really note from these at this point is that Blizzard are really discouraging the use of the Succubus over the Felguard as a DPS pet, since the succubus does not get a 20% damage bonus from the Glyph of Succubus.

*** Information added 1 Minutes and 31 Seconds later... ***

Originally Posted by El Tanakh

Every player will get a new spell book page to which they can add six glyphs — currently, two major, two lesser, and two minor

Actually, based on more recent screenshots of the Gyph interface, it would appear that there are now 3 major slots and 3 lesser/minor ones.