This is one of the better titles for a squad out there with Legacy figs. This R&B and Heavy Mettle should get some prize
That being said; Warmaster might be a bit better now with a disruptive proof 20 damage attack....but the JH bring slightly more HP (at the expense of D), mobility and activations. If only Vong had some swapping or tow mechanism.
Edit: I guess the CE with Warmaster does a lot for the squad. Bring him up and get a momentum 30 damage swing and dare the opp to risk another 30 to move away from him and towards the shaper. Then your JH can do 40 damage a swing....twice. hehe this is nasty.