Difference between now and the early part of the Baz ball era was they were getting themselves into positions to attack. Now they are not giving themselves the foundations to attack. Root, Brook, Stokes and Bairstow/Smith were coming in after Ducket/Crawley/Pope have given them a decent start, that's just not happening consistent enough now. Also the bowlers aren't as consistent and the attack is ever-changing.
Brook needs someone to come in and remind him what test cricket is all about - yes, you can be aggressive but trust your ability to keep in on the ground FFS and give yourself a chance. Maybe the captaincy will force him to do that but to me he doesn't seem intelligent enough to be captain.
Bethell is probably the most natural captain material, but he needs to concentrate on making himself a test player first.
We have to have a spinner who can bat - especially without Stokes.