Too late for that. Just rode the Rovals for my first quick ride (23 miles, 1240 ft vertical). Definitely like them, they are about 350g lighter than what they replaced, might (?) be slightly aero, and are running tubeless. As for the tires on them,
Front GP5000 TL 28c ----> 30.9 mm (at 75 psi)
Rear GP 5000 TL 32c ----> 33.0 mm (at 70 psi)
Lots of space still available in the Spz Roubaix frame. For comparison, on the old rims (18mm internal), the 28c GP5000 was 29.2 and the 32c GP5000 was 31.8. This is at the same pressures but for old tires with ~3500 miles on the front and 2000 on the rear.