I know exalted mods are all about being drop-exclusive and you still shouldn't be able to just craft them out of nowhere. That's why this glyph would only be able to make an affix exalted by reducing another exalted mod on the item.
If this was a rare glyph to find, I can see it being a fun additition to crafting. Like when you find a very high tier exalted item, but the exalted stat is completely useless (which happens frequently), this glyph could give you another shot at making the item useful with a fun little gamble.
In the endgame you find waaaay too many sh*tty exalted items, which kinda makes them lose some of the excitement imo. A glyph like this could improve this a little bit, making more drops potentially exciting finds, especially when you're at the point where you see a lot of exalteds.
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