Rise of the Resistance sets and vehicles look amazing... I know we still don't have a lot of info on the attractions specific layout but based on the promo/concept art we've seen so far, this ride seems to have zero physical thrill factor.... Seems like an adventure through empty corridors with storm troopers shooting at us.... which is still really cool!
I think that true, that it won't have too much intensity when it comes to physical thrills -- those this type of ride vehicle is capable of sudden moves and going along different paths. The "intensity" of the ride will be from the scenery and story. I would think staring up at an AT-AT would be pretty imposing and "thrilling" in a different way than a fast roller coaster.
Smugglers Run will be the more physical intense, but still -- as noted -- won't be too bad. Around the level of Star Tours I would guess.
Off hand, I'm thinking 40" height restriction for both. Maybe less for RotR. Maybe more (42 or 44" perhaps) for MF:SR is they want to try to keep riders a little older for the interactivity.