I've not used Edeas, and am not such a great skater as you - but could it possibly be the laces rather than the boots? I may be completely wrong, but it seems unlikely that the boots themselves can stretch that fast, or that the insoles can mat that fast. In other words, I would guess the laces must be slipping somewhere - either transfering material from a loose part of the lacing to the tight part, or slipping in the top bow knot. I can't think of any other possibilities.
E.g., all-cotton laces don't stretch, and they have a lot of friction. So you could give them a try. Maybe they would work for you, maybe not. Though to be honest, I use nylon utility round cord instead, which is very durable, very easy on the fingers, and I like the look - but I'm not doing fancy jumps.
I'm assuming that you already make sure the bottom of the laces are tight too - e.g., that you know that if the bottom is loose, the looseness gradually works its way upwards. Some people around here, mostly hockey players, use lace hooks to make sure the laces are very, very tight, everywhere. Which I would hate, but you might like. I also assume you have figured out a way to tie the double knot on top tightly. If not, you could try tying it as a double-slipped granny knot - i.e., make the overhand cross-over-and-under (or the first half of a surgeon's knot, with an extra cross), then shape the ends into loops (a knot expert would say "bites"), pull tight, and tie them in another overhand-cross-and-under.) Then I tie those loops in another overhand, to make it a double knot.
BTW I have tried using a simple bow knot instead of a double knot - and it always slips. Double knots work so much better.
OTOH, if tape works for you, maybe it is good enough. Why fix what works?