The power-scaling in HOO certainly does have problems, but at least some of them are fandom misremembering.
Frankâs transformation powers, for example, work best when he knows the animal well, when heâs in imminent danger, and donât work when heâs wounded. He also tells Leo that itâs like bench pressing your maximum weight to turn into a dragon - itâs dangerous, exhausting, he could hurt himself. Those are some pretty strict limitations.
Piperâs charmspeak (and charmspeak in general) is said to work best when the person is attracted to her (gross! So gross! But that is canon unfortunately) and when she really believes what she is saying. It also has a built-in weakness that itâs a fairly common power and doesnât work on anyone else who can use it or who is just⌠manipulative (Medea, Circe, Drew, Khione, empousia, etc). This is nowhere near to consistent across all the books and imo her powers are the least thought through (both in the frankly horrifying implications of them for both Piper and the people she uses it on AND for how successful they are). Unfortunately this power does truly just seems to show up as âbeautiful women are inherently manipulative and sexually entice their victimsâ and like WOW do I hate that lol itâs pretty horrifying. But technically that is another problem, the point here is that it was at least set up to have some built-in limitations.
Hazelâs control over metal (at least in SON) is difficult for her to use. She has been practicing it, but she has to concentrate a LOT and she doesnât have precise control over it. So the question of âwhy doesnât Hazel simply deflect everyoneâs swordsâ is pretty simply answered: itâs not easy for her to do, and without precision, this could be just as dangerous as just letting fights continue without interference. Yes, she is able to steer the unicorns by controlling their horns, so maybe she could do something similar with an army - but it seems the herd was stampeding in one direction and all she did was direct them back to the stables. Obviously this is not the same thing as controlling swords that are all going in different directions. Also yes, in theory she could crush people inside their armor, but the only antagonists who consistently wear armor in this series are Romans, whom Hazel does not want to injure and certainly not to kill, and again, a lack of precision could make this disastrous if she attempted to do something simple like "halt person wearing armor in their tracks." Personally, I think what would make it even better is if Celestial Bronze and Imperial Gold were especially difficult for her to control, like maybe twice as hard as regular gems and metals (sort of like how Percy's powers are much more effective in salt water). As for her Mist powers......... yeah I dunno I think these are WAY over-powered lol and it is frankly LUDICROUS to me that Hazel isn't included more in the 'most powerful demigod' conversation lol. I really don't think she needed any more powers as hers were already demonstrated to be some of the strongest in the universe as it was, but alas.
Jason is easy - sure, he can fly, but he experiences altitude sickness (actually wild Rick nerfed him so so badly with this lol) and he can't even technically fly, he needs the "support of the wind" or whatever so it's not as reliable as it would seem. Also it is demonstrated to be EXHAUSTING for him to do this so it really does make sense that he doesn't do it more often. And lightning same thing - like sure, if you hit your target it's great, but if you can't control it, which he doesn't seem to be able to precisely, it's probably smarter to avoid it, especially in the chaos of a battle.
Percy & Nico same thing - their powers are EXHAUSTING to use. Percy in particular is wildly OP in the sense that he's the only one who can actually get healing and energy from his power source - so long as he's in water he's not getting tired or drained, but obviously this is a geo-limited power and so not an option a lot of the time. But again, if Percy is not careful with his powers, then they do more harm than good and he has quite literally almost killed himself in the past from overusing them. & Nico has a very limited amount of dead-summoning and shadow-traveling uses in him before he needs to recharge, reminds me of a video game lol. and again he's shown to almost kill himself if he overdoes it.
Leo's powers are a bit unique in that he doesn't seem to really be exhausted (or at least not like the rest of them) by using them, but I think this is due to the nature of fire - and that's a double-edged sword, because his powers are dangerously easy for him to lose control over. So again, makes sense that he doesn't use them a lot. Especially because he has the built-in feature of being afraid of his own powers, which are consistently shown to make them less-effective in this universe. Leo has to actively concentrate not to burn off his own clothes, and his power is as much of a liability as it is a help (maybe even moreso).