Just as an fyi to some in this thread:
I have an '04 Ford Focus SVT w/ full leather recaro seating. The seats are awesome, except that the leather has the "hard, waxy" feel that was described by the OP.
Wanting to soften the leather up, I went the Leatherique route and dedicated my summer last year to rejuvinating my seats. Long story short, after more than 4 24hr-long treatments in the hot sun, my seats (although very clean) are not any softer. I even spoke w/ the Leatherique owner for advice, but my seats have that protective coating on them that just doesn't lend itself to softening regimens.
My advice is to keep tending to your seats, keep them clean, but accept that they are never going to be the soft, supple, "buttery" leather seats that you are envisioning. Save yourself the time, money, and energy of the multiple treatments that I went through.
Note: the leatherique products are amazing and I've used them with great results on other, non-coated leather products. The customer support for Leatherique is great as well, but it can't make the impossible possible.