The new one goes up fly first but the original goes up inner first, doesn't it? Not so good if its chucking it down.
That's one of the problems with my earlier-generation Hubba Hubba, Janet, and MSR did well to fix that. (Hilleberg and Tarptent products, and maybe others too, let you pitch the tent in the rain with less chance of the inner getting soaked.)
OTOH, I've never had that problem with my Hubba Hubba. Main reason is that I live in a place where I rarely if ever have had to pitch my tent in the wet, whether hiking, canoeing, or cycling. (Our rains tend to be concentrated in early spring and the autumn, and softie that I am, I avoid cold wet weather.) The couple of times I've pitched camp when it has been raining, I've rigged the tarp first, pitched the tent inner under that, then the fly; and then readjusted the tarp to give me a dry cooking/unpacking/relaxing spot.