Your observations look spot on. I wouldn't think there would be any box overlaps, since the took the Mumbo name off for a reason. If anything, I'd think the original colorways continued for a bit with the new box before the other lens options and colors started to be produced.
The Mumbo was released in late 1989, and here's the 1990 catalog:
As you see colors and lens shapes are as you stated.
1991 showed the progression from the swap over in 1990 with the addition of Strip, Sweep, Heater, with Strike/Slash promised in Fall of 1991. Colors expanded into some crystals and the 4 splatter designs.
Here's a UK pricelist from March 1992 which still called them Mumbos, but also mentions Slits (as a product name)
In 1993 we see most of the same lens colors, but the shapes are down to the normal 4 we saw until the Radar took over. Of course Hybrid was later changed once the Pro M Frame hit in 1997, but that made sense, since it was a hybrid of V and 67, both which were no longer around.
It does make mention of the rubber kits at this point with White, Slate, Blue, Black, and Clear being offerings.
In 1996, the lens shapes are still the same, with Slash pictured in the lineup finally. The Icon takes prominence on the temple instead of the Classic logo.
1997 still shows the old models despite the new Pro M Frame, which would provide the basis of the M Frame overhaul.