Sure, the models would be cool, but quite frankly they can make any Eldar model look amazing. Shining spears are amazing. I've been waiting over a decade to field them. They used to be so bad one questioned the dev's sanity. Now They're just bad.
If they're putting the new model as HS, it HAS to be designed as a vehicle raper to be playable. They won't give us anything better than the fireprism at raping troops unless they've recanted on their "fuck you, Eldar" stance, and if they do then people just won't consent to us fielding it.
If they give us a non-dedicated transport in Fast Attack then that would be AMAZING. Maybe an open-topped fast transport with dual twinlinked fusion guns that deepstrikes and has a "counts as non-open-topped for the purposes of shooting in and out" energy field that also has the WS effect to a) justify the deep-striking b) prevent it from popping c) to prevent fire dragons from breaking it in half.
Honestly, though, they have to make it fucking amazing if it's going to eat a HS slot. If they make a dedicate transport then it really, really depends on what it does an who can take it. If it can be fired out of then Fire Dragons will break it in half and Dark Reapers might become playable.
But... none of that will happen. We're almost certainly getting something at fast attack, despite the new precedent for FA slots set by BA.
As such, I'm hoping for something that's a real prince when it comes to vehicle hunting. Pulsars would be nice.
Her(?) name may be slightly inapropriate, but she just needs love! And I just need to eat your face!
I'm probably going to follow my usual Eldar tactic of driving around the table "circling and screaming 'I don't give a fuck' with my windows down and system up" and avoiding anything that looks scary.