You don’t have to wait on that … I posted a full review, with comparisons, a bit over a month ago.
There’s also a fairly healthy discussion, with several other users impressions, in the main discussion thread for the Elegia.
I’ve not read anything about the Elegia having the same driver-excursion limit as is observed (and acknowledged by Focal) in other Focal headphones . I’ve not been able to get them to exhibit that behavior myself. The driver design has some differences vs. the one used in the open-back models which may have eliminated it, or just make it require a lot more energy to trigger.
Either way, I would not personally go for the Elegia if I was going to use it with a lot of EDM style music, nor if I was a bass-head (closet, or otherwise). Unlike most closed-back cans, the Elegia does not have a big boost in its bass response - the tuning is more neutral, nor will it do slam like the better Fostex, Audeze, HiFiMAN models or even properly driven/setup HD8XX(S).