I think the Vaksai is WAY too E-Wing-ish (I think that may be why they went for the forward cockpit variant of this one as well)
As for the Dunelizard, I love the look of it, but what would it do? Everything I have found about it says, essentially, "it's a Scyk but better." However, I think there is potential for a title like the Heavy Scyk that could give you either a crew or salvaged astromech. Still, outside of looks, how is it not a Scyk with more shields?