Awesome. Thanks. Actually, my gut says it's one of these three, probably the rotspeed one. But that cvar thing led me to find these. (copypasted from ufoconsole.txt after entering the command cvarlist in console)
cl_camrotspeed "250"
cl_cammovespeed "750"
cl_cammoveaccel "820.59"
EDIT: Turns out "rot" stands for "rotate" and not, well, rot (decay)... <.<
Anyway, it IS the cl_cammoveaccel, which I upped to 90000, virtually eliminated all camera pan speed-ups and slowdowns. Idk if there's a max value to this, so anyone out there might want to try more conservative values first, like I did.