Honestly kind of absurd to worry too much about words not being "fictional" enough. Unless they invent a whole new language it's going to have to use English or some other Earth language, and if it's in an entirely made up language it can't be read. Simple logic dictates that therefore some degree of familiar words are needed, and at that point it's just quibbling over where exactly the dividing line is.
The issue is that Ikoria has no reason to distinguish "good" hunting from "bad" hunting. Either hunting is discouraged because "monsters are sacred" or they are not. If the former, then why not simply call them hunters?
For Ikoria it's a baffling choice of words and the fact that it shows up so often implies that it is part of the world building and not an errant word that found its way into a random flavour text. This points to Ikoria's worldbuilding being rushed even further.
This is actually my main gripe with Ikoria. The worldbuilding feels very unrefined. Ikoria has only one thing going for it and that's the monsters. Take that away and there's literally nothing of note left. Other worlds are much more robust. Take away the nyxborn from Theros and you still have a greek world with the different poleis. Take away the guilds from Ravnica and you still have a city world. Take away the egyptian flavour of Amonkhet and you still have a world that is tragically and sickenly corrupted by Bolas.
Take away the monsters and there's what? A world with crystals? That is neither a hook nor... anything.
The humans on the world also don't really fit into the whole thing either. In Zendikar the cultures were shaped by their environment from their clothing to their weapons and even architecture. Sure, you could say that the whole mutating thing is recent but A) it's still not aesthetically pleasing if you don't know the history and as such have a special connection to it (like Dominaria does) and B) in that case you really need to show hints as to what the world was before, with ruins and so on (like Dominaria does). For all intents and purposes, Ikoria has no "before state".
To add insult to injury, there's hardly any cards representing kaiju-like monsters. Not even mutate allows you to build up kaijus, because the power and toughness don't stack. It's all just a soup of creatures that exist on other worlds as well, except without any sort of defining flavour. Ikoria monsters can be anything, their unifying feature is that there is no unifying feature, which blurs the whole world even further. The only thing Ikoria wants to do with kaijus, and it doesn't even do that very well.
I must admit I wasn't a fan of Eldraine either. It felt pretty shallow as well (but not as much as Ikoria) and the fairy tale references were too often way too close to the source material to make the set not feel like a non-canon crossover. Basically what Eldraine did was what Ikoria did with its Godzilla promos, except unironically. Both sets feel very fanmade and I am worried the "one set per world" paradigm is hurting the worldbuilding much more than anticipated.
HAVING ALL THAT SAID, I actually really like Ikoria as a magic set. Mechanically it's probably one of my favourite sets, if not the favourite set (reserving judgement for when I actually got to play with the cards of course), but worldbuildingwise it's one of my least favourites.