I too installed the tweeters in the pillars. I set them @ -3db. Given how much closer they are to your ears and the amount reflective surfaces, -3db may not be enough padding. I eventually have to run a sweep with my RTA to truly say.
I'm happy with the tweeter and its integration, but the woofers have always sounded weird, and my guess it has to be the weather stipping cloth right up against the woofer. I think much of the upper mids reflect back into the woofer.