pmm711, I find that the increments don't matter too much anymore when your CC has free putter pal and shot pal. Automatic increments of 10% makes up for the increments.
For the original poster, when looking at the stats, is it worth 3500 credits to upgrade 0.5 precision?
I have grown to enjoy the 94+ in the past few days due to its very nice meter speed. I upgraded from a Max Control (Master+). The Nike downgraded the balance but upgraded the precision and meter speed by 0.5 each. So all-in-all, the upgrade was a net gain of 0.5.
So I guess my answer is that if you have the credits and aren't planning to purchase anything else, it's not a bad decision to upgrade for a net gain of 0.5 (I did).
But it's not a bad decision to not do it either. I find that the major help in my upgrade is the meter speed, which is exactly the same for your 77+ and the 94+. So it might not help you as much as it did my upgrade from the Max Control.