Are inverted skillcapes on that list?
I'm gonna need to make a sign about inverted skillcapes so I can post the "Don't make me tap the sign" Simpsons meme.
Anyway: Yes they're on the list of things players are asking for! We currently aren't planning on introducing them into the game as we're still looking for the best way to implement them.
(This is not an invitation for suggestions on how to implement them, you've all provided lots of lovely ideas before lots of times, thank you!)
I, personally, am of the opinion that we need to implement them either as a reward from another limited time mode (like FSW, or a Leagues if you've played OSRS) for consistency, OR we would introduce them as a skilling reward beyond 120, with some kind of shard system players earn while skilling, and then combining shards to "rebuild" the cape.
I am but a humble CM, so my opinion is just that, so I'll leave the design and development of whatever idea we eventually go for to the experts!