One custom boot maker told me that, on full custom boots, they try to size and position the outsole so that type of mounting (the front of the outsole flush with the front of the blade front mounting plate) will be ideal.
Of course that is hard to do, if they don't see the skater, but have to use someone else's measurements. E.g., the position of the front will vary if the blade is offset - and they have to guess where the foot is most flexible (which should be placed a little behind the sweet spot) based on a foot tracing. In addition, if they don't provide the blades, and they don't know what type of blades will be used, they have to guess where the sweet spot on the blades will be - which varies by blade brand and model.
AFAIK, most of the skate techs try to size the blade so that, with the front flush mount, the back of the blade heel plate will be between flush with the back of the outsole, and up to 1/4" forwards of that (many say 1/8"). Presumably, as with the front mount point, a custom boot maker can try to make that work well with the skater's foot.
But the "normal" positions and lengths can't be expected to work optimal on a non-custom boot, or, even on a custom boot, when the boot maker has incomplete information.
The skate tech I've discussed this with most, who is very well respected, told me that he mounts the front mounting plate flush to the front of the outsole. He knows it doesn't always make the most sense - but if he didn't, most of the people in the business would view him as incompetent.
So, instead of adjusting the front/back mounting position and length, he often reshapes the blades to work with the skater's feet.
Of course he does custom work, so if a skater asked for a different position and length, he would provide it.
Regardless, AFAIK, Edea doesn't create full custom boots. Some of their dealers are trained to modify boot shapes with heat guns or hair driers (their version of "heat molding"), but they can't modify the sole area. So there is no reason whatsoever to presume that a "normal" mounting will be optimal for a given skater and blades.