Woo! Congratulations! And thank you! It makes me really happy to hear you had fun! I love it when people love my characters and how all of them get along! It was really important to me that they grow as a group of friends all together instead of only getting closer to Makani. And Vane is absolutely a friend-shipper XD
Actually your headcanon is true canon! Makani does have a scar and a slight limp from now on. I just keep thinking of it in terms of how it's reflected in the sequels so I forgot to put that into the ending (my bad). Because yes, there will be sequels. Two planned, and if I can manage it a short stint at webcomics to go into some back-stories, but two more games for sure. The other games will have their own central casts (you catch a glimpse of one of these upcoming protagonists in the "Awakening" CG), but Makani and co. will continue to play a big role in the series, don't worry.
Makani and Vane are both 19, Kameckt is 26, and Groriu is 28. I hope those numbers don't bother anyone too much... Kameckt and Riu had to be a bit older for their backstories to work.