I’ve always found achievements in general to be pointless time wasters. They rarely add anything to the game but grinding.
Your decision to add gear rewards to them is a good start but I’d like to go further.
I’d like to be able to buy weapon skin tickets for events that have come and gone.
Currently I’ve opened what seems like a bazillion dragon chests and have nothing but taffy to show for it. I’m sick of it but I still want at least one of the dragon themed skins.