I really do think that Feyre having such a wide range of abilities is actually so much more detrimental to her character as written by sjm.
Feyre has a drop of magic from every court, which originally was to bring her back to life, but it seems to have powered her far beyond just a drop. How the powers manifest seems equally odd. One drop of power from autumn and summer respectively and she's able to attack Beron (the oldest of the high lords, btw) with his own flames and drown him with water from an indoor fountain?? how on earth does that track? Any of the high lords should be able to wipe the floor with her as far as both power and skill with said power is concerned since they have much more than her and have had it for significantly longer than she has. (Tarquin being the exception depending on whether water is a high lord's power or a summer court power and whether he's only had his since becoming high lord utm or not)
Next, Feyre receives 1 power from each High Lord but two(??) from Tamlin (shapeshifting and wind) which is odd, all things considered. plus, the wind is never brought up except when she makes a shield of solid air in the study and when he saves her from Hybern’s camp.
Feyre mastering all the Court's powers without ever having witnessed most of them or been taught by masters of those powers is nonsensical and limits her to never having to leave the NC, which in turn gives her a very narrow view of prythian and the fae in general. The one time she visits another court, it's to rob them and even though she considers trying to befriend them instead, she ends up going with Rhysand’s plan and any hope that she'll be able to think for herself is dashed.
but mastery of these powers without seeing where they come from and how the original bearers wield them means that feyre only uses them whenever. there's no rhyme or reason beyond whatever sjm imagines to be the most badass for the situation
sjm has been inconsistent with writing (color me surprised) the high fae powers since book one. At first, the narrative insisted that they didn't have particular powers and only existed to rule. Tamlin's shapeshifting was noted as something particular to him, maybe to his family, and maybe even looked down on by other High fae (iirc, rhys seems sort of dismissive of it) The beginning of book two changed that and was never clear as to whether it was High Lord's power or court powers and why Feyre seemed to have such huge amounts of power despite only receiving a small amount was never really answered.
Personally, I've always liked the idea that, once resurrected, Feyre belonged to every court having been born from the magic of every court (every HL is her father now lol) and should have been the unifying force, or at the very least, the ambassador to all the courts. If she was always going to end up High Lady(or even High Queen, as much as I would hate for that to happen in canon), this would've been a much more legitimate way for it to happen as the "daughter" of all the Courts and thus the only valid heir to the entirety of prythian. I could get on board with that kind of High Queen of Prythian, especially for the juicy angst she'd have, bearing the same title as Amarantha and all.
What Acomaf should've been was the HL's discussing custody rights ("Fine, you get her from Summer Solstice until a month before Autumn Equinox and then—")and insisting that she be trained properly. Feyre finding or making her own place among all these hyper-powerful near-immortal beings and learning to manipulate/coax/get along with them with the powers she got from them would’ve been a lot more interesting and would have utilized the powers a lot better imo
as it stands, Feyre "masters" her abilities in less than a year despite most of her training being physical instead of magical and never even uses all the powers on page which is just a waste of what could've been excellent world building or even characterization if they explored which power feyre finds easiest and why.
but it's all just wasted potential. a pity
