I know this is a very discussed topic here, many players want it, i'm just pressing the button again, so "maybe" the devs put some effort on that this year(i hope). I'm aware of the time/resources sink on big updates, One Tamriel and now Homestead, i understand that.
I agree with one or other be crown exclusive, but with the current state of crafting i have no reasons to buy anything crafted related from crown store. Crafting is one of most essentials things in a RPG, and is one of my favorite features in this game(even at the current state). I gave up from collecting motifs at the moment. I considered to buy Frostcaster, but nah.
In my point of view(and many others) is a very simple thing. Redesign the sets, you don't need to make them OP, make them usable and desired again. Create a couple of new sets. Add some achievements, one or two titles, a costume(like a crafting uniform), from achieving something will not hurt. Both get happy, and players get motivated to play the content, collect things.