No thanks, I'd prefer useful stuff from antiquities.
Oh fair enough, but thinking back the only remotely useful thing I've received as bonus loot has been a rune, everything else has been trash treasure to sell for very little so the occasional Crystal would at least be something useful for some people.
Stellar idea OP. No reason we can't get transmute crystals as a bonus find in a dig. Makes perfect sense. More sense than being given it through the mail in a dungeon daily.
Crafting writs should also have a chance to give transmute crystals.
For all the "play it your way" going around lately, there sure is an awful lot of 'leading' to get players to do specific content for specific items.
I'd rather see a system similar to endeavors that reward a set number daily/weekly for various tasks. If you want to grind them do the tasks if not collect them casually as you play. As long as i had a variety of activities.