Transverse V6.
Yes they use the same "architecture" as the Evo, but the Evo has a 4 cylinder, which doesn't place half the motor on the front-side of the crank, like a transverse V6.
Also, it forces the transmission to be placed in the front-end, whereas any longitudinal mounted motor will place the transmission near the center of the car, allowing proper weight balancing.
Argue all you want, this placement forces a lot of weight in the front, and it makes sense to assume that it must've handled much worse than its competitors, like the GTR, the Subaru STI (GC8, come on!) and the Evo itself! I believe it is fair to assume it was underrated, but still not the greatest thing ever either. Also add to the fact that the ones found here were FWD versions which equals everything but fun, well popularity goes down the drain.
Yes, Mitsubishi made the Evo, which is a legend, but they also made the 3rd-gen Eclipse and this whale.
And while on the topic of Mitsubishi, I'm also sort of expecting a public statement in the near future from Mitsubishi saying how they will be closing down their car dealerships here. There are so few of them on the road I wouldn't be surprised if they finally closed down.