As PP have stated, the Fantasyland aspect of 7DMT makes it very friendly towards younger, smaller guests.
Figment was rehabbed in 1999 and 2002. Not sure what you mean by newish? It was changed over a decade ago. I agree it needs to rethought and redone again, but it should stay as a Figment attraction, for all ages.
Test Track is about the same, with just different scenery. If you close your eyes, it's easy to imagine you are back in the old one. It's still fun, and we mastered the car design for high score this past trip.
We also went to Universal - was disappointed that there was just one ride in the new Harry Potter area, the shops are still overcrowded/tiny/poorly designed, and they did away with the toy shop in Hogmeade. Also disappointed that so many of the storefronts in Diagon Alley are just sets and not real shops. Hogwarts Express was brilliant, Gringotts was a nice, scaled back version of Hogwarts, but the mass=holding areas of the Universal queues are cheap in design.