I'm repeating (Slightly edited version of) a Message that I made in The Isle Discussion Text chat, specifically in reference to this Suggestion: #general-feedback message.
I will say that while I do agree that permanent inJuries would significantly help fix that (And would also be positive in other ways), and I have thought that for a long time, I'm Just unsure whether or not they really fit The Isle, at least in its current form.
Now I will be Voting for that suggestion because I do still like the idea, but I'm not at all certain that it really fits the Game. I have a few reasons for thinking this, but one is that it seems too punishing for this Game, The Isle is a Game where you don't spend a huge amount of time as any individual creature (A few play sessions is the most you can expect from most creatures) so the impact of permanent inJuries is fairly minimal and would mostly Just frustrate People, additionally for plenty of People most of the fun of The Isle when they reach Adulthood is PVP, and if you suddenly lose your ability to do that as effectively then for those People you might as well Just grow a new animal.
Honestly for permanent inJuries to really work well, I think there needs to be a much higher focus on The Isle's PVE and non-Combat elements, and ideally creatures need to stick around longer so that it's not Just easier for you to grow a new one, and you're invested in your creature enough to not let the annoyance stop you from having fun with them. Until at least the first one of those things happens it's probably going to Just be an interesting idea that probably isn't worth the negative aspects of it, the annoyance caused by it, and the development time, unless implemented absolutely amazingly. I'd say it's probably a system that could work well in The Isle, but only if implemented amazingly, and it's also definitely much more suited to other Games.