Specifically for Fire TV Recast but applies to Fire TV in general. I have the 4K model and one feature I noticed missing is the ability to frame advance or execute slow motion playback. I had this on my Hopper DVR and I'd love to see it on Fire TV. Very useful especially when reviewing sports programs.
you'll need to make that request directly to Amazon. Unfortunately, no one from Amazon's Management, Technical Development, Customer Service or Device teams reads this customer to customer help forum. You could try here: