Kinda just want Tommem to stay on there at this point, he's young and naive but at least he's not malicious or particularly scheming. It doesn't suit Jon to be in King's Landing just like it didn't suit Ned, and Daenerys is honestly made up by the sum of the parts that surround her. Need political smarts? She has Tyrion and Varys. Need protection? Grey Worm, Jorah and more. Need a "holy trout I'm screwed, bail me out" plot device? Dragons.