i got a idea. seeing omegle video,i got an idea of making the character more alive without additional tracking.
it is to add full body animations that are premade for the avatar and trigger-able by a hud button and/or a keyboard shortcut /macro or command-lines.

i am thinking about regular simple full body animation like:
wave
thumb up
thumb down
thumbself
clap
jump
duck
kawaii
fu
slapself
slapcam
punchself
punchcam
selfie
sleep
fall
throw
highfive
brofist
taunt
heart
dance
scared
hideface
jumpscare
handsup
pointcam
pointup
pointdown
pointself
pensive
hugself
hugcam
angryfist
sexy
flip
blush
goesaway
...
it is almost endless.
note: some will blend with camera feed but some animation will totaly overide it.
it is the animation you see in regular avatar chats basically.
(note: some animation can have sound included)
i hope you'll like my idea.