The seals are an exact mirror of items in the currently available crates. You might be better off asking for race and name change tokens to be added to one of the crate tiers, similar to how utility items like riding lessons and XP scrolls can be found in crown crates. Then they would also be available via seals.

The endeavour system exists to comply with Microsoft's policy on loot boxes, which is that everything in loot boxes will also be obtainable by playing the game. They have no such policy for cash shop items and aren't likely to create one since cash shops have not faced the same level of controversy as loot boxes.

I think adding an alternative way to get the character change tokens would be a good idea, but I think it's unlikely ZOS will do it.

Also my preference would be to make the crown exchange system official - add a system where players can sell crowns for gold without the convoluted pseudo-gifting approach we have now. That way players could safely buy crowns with gold within the game (instead of having to go through Discord or whatever) and effectively everything in the crown store becomes something you can get with gold.