Rose's new Ultra i don't see a point yet...but they are still tweaking so theres hope. Juri's Feng Shui Ultra seems to allow you to do chain combos like Darkstalkers or something so it can see it being pretty damaging especially if they decide to remove damage scaling when you do it. To me it has alot of potential and hopefully not broken like Custom Combos are.

About car smashing...of course its bad!