These are my suggestions, please add your own.
Better fit, perhaps oval fitting in the ear to have a better hold. I had problems where the ear piece fell out on numerous occasions and didn’t feel comfortable when worn and didn’t pass the head on pillow test.
The touch controls on the ear pieces were not consistent and didn’t always work, particularly when you had to tap 3 times. The tap controls were also uncomfortable to use as the tapping would vibrate through the ear.
The equaliser didn’t make much adjustment when altering the EQ.
The wing tips were useless, perhaps there could be an over ear hook to add for running? Making them more versatile.
More adjustable ANC, when using the ambient sounds with meditation, being able to adjust this with outside sounds will create the best surround sound experience. The balance between inside and outside sounds in harmony.
Not sticking out of the ears too much. When in the ears, the Lib 3 pro, stick out like they’re hanging out of the ear. It looks uncomfortable to look at and feels it too.
The wings getting too greasy and slip off the clip too easily making the seal very unstable. The clip needs to be bigger or the rubber less slippery.
Water proof against water damage. The case is too sensitive and needs water seals possibly.
These are my suggestions to upgrade the liberty 3 pros of what are outstanding ear buds.