Mirror Image Question

I have some questions about the mage ability Mirror Image. As a Fire mage, my mirror images shoot Frost Bolts unless glyphed. I find the frost bolts useful as some extra CC, but I'm curious as to why anyone would want to glyph Mirror Image so that they use spells of your primary spec? Do your mirror images benefit from things like your Talents or Glyphs? Can they take advantage of ignite or other fire talents when it's glyphed?

If not, I don't see the benefit of using the glyph, since the slowing affect of the frostbolts would far outweight them shooting fire in hope that any decent player would somehow be fooled into confusing them with my actual character.
The glyph is mostly cosmetic. It's not a dps increase like some people say it is, because your images stop casting fire blast when glyphed. For pvp, you will probably want to stick to vanilla images.

I have some questions about the mage ability Mirror Image. As a Fire mage, my mirror images shoot Frost Bolts unless glyphed. I find the frost bolts useful as some extra CC, but I'm curious as to why anyone would want to glyph Mirror Image so that they use spells of your primary spec? Do your mirror images benefit from things like your Talents or Glyphs? Can they take advantage of ignite or other fire talents when it's glyphed?

If not, I don't see the benefit of using the glyph, since the slowing affect of the frostbolts would far outweight them shooting fire in hope that any decent player would somehow be fooled into confusing them with my actual character.

As an arcane mage, I've glyphed to get arcane-firing mirror images because the damage they do seems to be about double the mirror image frost damage. It's still not a lot of damage output, but I'll take anything I can get. And I slow targets automatically anyhow with Arcane Blast.
Entirely cosmetic, or if you plan to use the glyph in pvp as fire/arcane, and thus plan to conceal yourself amongst your clones for a moment to confuse enemies. But let's get real here, nobody pvp's as anything but frost now to survive (mages are a focus target nowadays for various reasons - consult arenajunkies.com to see why).

Even if you claim to get a dps increase from the glyph in pve (they do not benefit from YOUR Torment the Weak talent, or munch Ignite), Mirror Image itself isn't even a dps talent. It's a threat-shield talent, not meant to boost dps but hide our threat for 30 seconds; the dps/dmg it adds is minute in the big picture.