I don't see anything inherently imprecise about 2x3" sheet film. It's on a thicker base than rollfilm and has no curl, so those are advantages, plus you have the advantage of individual control of development, if that's important to you.
Linhof rollfilm backs have excellent flatness, but they're also heavy and bulky. If you're shooting a lot of exposures, a rollfilm back is more compact, but for relatively few exposures, sheet film may be lighter or more compact.
For my 2x3" Technika, I have rollfilm backs, regular holders, and Grafmatics. Usually I use a higher speed rollfilm for handheld rangefinder shots, slower sheet film for shooting view-camera style on a tripod. I also use rollfilm for color.