I have enough dyes unlocked that this doesn't bother me but I think it would be appreciated by newer players.
It would also help to show off what the game has to offer style-wise. Dyes make all the difference. You can make even the lowest tier clothes and armour look awesome with great dyes.
You want new players to see what's possible in that department and feel like they have something to aim for.
I recently grinded the black market mogul achievement afraid my efforts was going to give me a new dye... it was worth the effort but not all dues are worth the effort as some dye horribly