I recently got new Saucony Kinvara 2's; before that, I was running in Mizuno Wave Inspires with Orange Superfeet Insoles. After putting in the superfeet in my Kinvaras, they actually feel kind of weird... whereas the stock insoles in the Kinvaras don't.
Should I just stop using the Superfeet and run in stock insoles in the Kinvaras? (ie. do the Kinvaras provide enough arch support and all that?)
There's not really any "arch support" in the Kinvaras; that's kind of the point. That being said, if you like the shoes without the Superfeet, run without them for a while and see how you feel. If you don't want the Superfeet but want more arch support, try the Mirage.