I found that the bath vent air flow was actually too good at the expense of the rest of the system. Being right next to the furnace, running wide open and undampered allowed it to overheat the space while other areas remained cooler. I swapped out the grill for a drop-in replacement with a damper that I picked up on Amazon for $9. I keep the damper almost entirely closed which helps build some static head pressure in the system and pushes the air out the rest of the vents much better. I've also noticed that the bedroom floor vent at the foot of the bed is poorly positioned as it blows the air right up into the mattress overhang. No much we can do about it but be aware not to let the covers hang off the foot of the bed if we want warm air to circulate.
Ode to the Forum Moderators
May the Mods grant me the serenity to accept the opinions of those I cannot change,
the courage to offer valid input to those who are open to another way of thinking,
and the wisdom to shut myself down whenever I get too in love with my own misconceived brilliance.