I wonder if Dan's test career will mirror that of Tom Westley? When everyone is available he will be well down the pecking order unless he gets a big score second innings. I agree that the comparisons between Moeen and Bess do not bare scrutiny. Bess is very much a work in progress but I think he will do very well at Yorkshire.
I think Dan's in a better position than Tom was, he's much younger than Tom was at his Test debut for a start. He's just not a number 3 at the moment.
I hope you'll be watching Dom B getting a lot of long, successful, bowls with the Yorkies next summer, it'll do him the world of good. I can't see England playing 2 spinners much at home and, purely as a bowler, Jack Leach is far better. IMHO Dom will only get much Test action if the selectors are trying to shoehorn a lot of tail-end seamers into the same team: pick Jack with any 3 from Jimmy, Big Stu, Joff, Ollie and Mark W and you've got Jack (or Mark w?)at 8. If Chris Woakes or Sam Curran fill the number 8 spot, playing Jack L is a no-brainer IMHO.