Thundercats 2011 was great. I mean, it even had Thanos and infinity stones before it was cool. Such a good remake simply couldn't survive in final-stage capitalism, as those who worked on it didn't sacrifice quality to more efficiently promote plastic landfill. Well, at least my secret network of spies across the WWW managed to track down one of the art directors (well, his DA page), here I found something interesting I didn't even notice while watching the show.
See where the wings are? Well, I think this image shows it even better. They're closer to the waist. In paper, this solves problems with balance, but people who praised this idea forgot that now these bird people have a big, rigid bone in the area of their stomachs, making basic things, like bending down to grab something, an impossible task. I have very, very similar creatures in my world (please don't sue) and I haven't actually thought about this... HECK!
My two other six-limbed creatures, centaurs and dragons avoid this anatomical problem. Centaurs have their human body where normally a horse's neck would be, which is pretty flexible; and dragons are still rather snakey, despite their bigger chests, plus their forelegs have been dialed down to reduce the TPK-capability of an all-out "paw-paw-bite-and-set-on-fire" pounce.
Bird people aren't particularly snakey, neither are they short kings like the aarakocra. I still wanted to keep the bird people's weight low, because I won't go through the same headaches, estimating dragon flight-capability had brought.
Alexander Zass, the guy who could bend steel, was only 167 cm and 80 kg. So I guess we will be safe with a total mass of 70 kilograms for bird people, plus what Marden said that around 20-25% of a bird's weight is their flight muscles, we get either 56-52.5 kilograms to make the rest of the body. As I said before, I'm more lenient with height (they can be taller if that helps the issue), but weight is still a constraint.
Sure, they aren't supposed to be strong, yet taking away even more of the pecs sounds like a bad idea, as they still need to do things like wielding weapons and
coffee covfefe mugs, but then the lengthening of their ribcage is inevitable and I am Iron Man. But seriously, how can I keep these bird people out of the uncanny valley while also giving them enough flight muscles without compromising their ability to do ab crunches?