I would say there is a “rear steer” or “bump steer” effect but only because the cantilever offers I think the most down travel of any factory style still using a track bar. However it is nothing that is technically wrong, it just takes a bit to get used to what it wants to do on lines with big articulation.
For those suggesting they wish they would have gone with triangulated, aftermarket fuel tanks and giant coilovers through the body, there is a ton of negatives that go along with those changes that you simply do not have to deal with on the Evo cantilever, yet still get to go as fast if not faster, have similar usable travel, can bet setup with lower stances without other issues, etc., etc.
If you want the cool factor, sure, triangulated shows off your pretty shocks and the whole nine yards.
I know and have wheeled with quite a few guys with the cantilevers, and for all the other crap wrong with modified Jeep’s, I don’t think I’ve personally heard any of them say they wish they wouldn’t have done it. They usually only talk about going far more custom, ie, trailing arms, etc.