Indeed. In fact Stormchasers showed multiple iterations of two tornado-chase vehicles - Reed Timmer's Dominator (which started as a common-or-garden Ford Explorer with some extra window protection, but evolved into something similar to this vehicle); and Sean Casey's TIV, which was designed to film tornadoes (not F5's, obviously - many Stormchasers episodes feature Sean's team trying to find sustained tornadoes that aren't too vicious for the vehicle's capabilities) from the inside.
Casey did eventually get (IMAX) footage from inside a tornado. His film is out and has been shown in a number of IMAX theaters. I think in the last season of Stormchasers he was back at it, trying to get IMAX 3D film this time.
So: 1) nothing terribly new about this Iowan effort, and 2) this sort of vehicle, including particularly the ground plates, has been tested. I know the supergenius team of Reg commentators knows more than all the rest of the world put together, but really, guys, you could do just a little bit of research before complaining that the Iowan team hasn't done any.
Of course, Stormchasers is also a reminder that on-the-ground tornado research is very dangerous, even when it doesn't become hey-I'm-no-longer-on-the-ground research. There was plenty of footage of tornado-caused destruction, and a few episodes that consisted mostly of the principals helping out in tornado disasters. And Tim Samaras, one of the most cautious researchers featured on the show, was killed in a 2013 storm, along with a co-worker and Tim's son Paul.
(It also shows that in fact not all tornado chasers are men. Just the overwhelming majority of them. Of course no one in IT is familiar with that sort of gender disparity.)