Thanks to all the debuffs that apply after the stun from Bastilas Fear expires Vader can do some serious damage with his Saber Throw. With Force Crush he can not only speed down the entire enemy team but incrase the number of debuffs and while doing so he gets more turn meter from Palpatines leader ability to literally oneshot someone right after.
There's better synergy in total and against JKRevan teams he is very useful too. Jedi can't evade his basic attack and the Ability Block that comes with it plus he gains extra speed on start of the battle when they're present.
So all in all you can use him very tactical which is the same for Thrawn, i guess it depends on playstyle.