If I look at what I use and what annoys me, I would have like to see focus on 'Dyn async trait' and 'Traits for being generic over runtimes'. I think it is quite annoying that you have to decide on a whole eco-system when you are doing async code. I have had times when I have search for a very niched library, only to find that it is written for the wrong async runtime. And the longer it takes to correct this, the more cemented it will be.