Mouthfeel is only 5 points total but involves more things than carbonation levels. Appearance is 3 points and carbonation can also play a role there as well (think of a flat tripel.... ).
Sometimes when I use my beer gun I pull the tip of the gun just out of the surface of the beer as I am approaching the neck to help create some foam (yes, a bit of splashing occurs here, but the bottle has been purged well with CO2), which I then cap on. Maybe you could try that next time. If you don't do the foaming thing, then you can always top off with some CO2 and blanket the beer directly before capping.
Thanks. My process was a bit inconsistent as I was figuring out what worked best for my system. I was trying to do it quickly and waste as little beer as possible. I did cap on foam for a few but some were foamier than others.
For next time, it seems like my best results will come from shutting off the CO2, purging the keg, and bottling below the recommended 5 psi. Also, my bottles were not cold so that didn't help.