Edea boots don't have high heels. And I don't know any popular brand of skates on the market (I've had almost all of them, except Harlick and Graf, and I've deconstructed many of them to measure heels and troubleshoot my own foot problems) that have a heel height that is lower than Edeas by an amount that would matter.
The footbed profile placebos people into thinking the heels are high, but they are not.
The decrease in blade size was likely a bigger issue. 0.5" is a huge difference and you're going to feel like you've gone from an 8' Rockered Blade down to a 6' with that kind of change (figuratively, not literally :-P ). If you've been skating on the longer blade for a long time, you may never adjust well to such change. The obvious fix for that is to go up 0.25" and mount end-to-end (which is what the poster above has done).
As for mounting Edeas, they tend to be mounted like any other blade. Personally, I prefer an end-to-end mounting on Edeas (for myself, I used to skate in them) on them because the design of the boot has much to do with the smaller sole measurement. The smaller measurement is expected with such a slanted footbed, but the external heel design (where the blade is mounted) also has implications in reducing blade sizing for those skates.
I'm not sure about other people, but I can feel where my heel is mounted on my boot when I am skating. In Edeas, I couldn't skate when they mounted 0.25 off the back of the boot. It felt way too forward, and it the shorter blade made the boots feel extremely steep. It was scary. I had to go up to an end-to-end mounting on them, which was actually helpful, because when I switched off I just reused the same blades on the "longer" boot soles for SP-Teri :-P
I also mounted Klingbeils and Risports end-to-end. Jacksons I had 0.25" off the back, and I couldn't really "skate" in them.
Mounting blades (gap vs. end to end, alignment, etc.) is really personal though. Like rocker profiles and R.O.H. for sharpening, Lol.