I've got a full write-up that will be on Prima's site later today, but I can address my thoughts on these questions.
He grounds you after the normal grapple, which I think will setup empty jump setups and allow you to activate Instinct then go into rush down mode. However, the Shadow version of the grapple launches. We just have to see what you can get off of the launch.
Cool, will be interested to see your additional thoughts!
Without "PHOENIX", I guess we can guess DP -> Stomp as a launch ender for him now... "get in and STAY in" sounds like a good trend for grapplers in this system.
In mid-combo, it may be like Jago where you can't use it as a Linker, but it still works as a proper Ender. I would assume the same would happen with his DP, which means the only Linkers we know of are his Triple Axe and Ankle Slicer.
I really want to know frame data on the ground stomp. The DP is projectile invincible, but hopefully it has good priority and the stomp is at least safe on block (please be advantage!). If the stomp isn't safe, or if both moves lack priority, Jago will still be able to bait it with a fireball into a Shadow Wind Kick.
I like how he seemed to have an instant-cross-up version of the DP->Stomp in there, too. Maybe it's it's not at advantage, you'll be able to use early-stomps with low recovery to bait unsafe reversals?
It looks like you can't break it, but we'll have to see if it combos. Most other Shadow attacks lead into a combo. I don't think you can break Jago's Shadow DP, so this looks to be the same.
Ahh, I hope certain unbreakable shadows are a thing. We need a counterbalance to the breaker-tsunami that the game seems to be heading towards.
Do you think Thunder's Grapples look Jumpable on reaction, are are 100% confirmed if in range? He has some windup, but I'm assuming that's more aesthetic, rather than gameplay-related.
And, being the grappler, I wonder if there's anything special about his non-command grabs...