Steppenwolf: You are right. SHIFT-constrained lines should shorten, not double back on themselves. We'll look into this.
ace-angel: Pro release is mainly just waiting for us to get a decent amount of Lite feedback and sort out possible bug reports. You're not going to be waiting for long
El Electron: It would be good to know exactly what feels imprecise to you. That may even be an input bug, so any information is helpful, especially images or video of the issues.
Mark Dygert: Now that's quality feedback! Much appreciated. So, as you can imagine, this being a cut-down version of the tool has a lot of impact on workflow. I'll try to respond without getting into Pro version specifics.
Brush size control: You'll definitely want to assign keyboard shortcuts to those, like in Photoshop.
Subobject mode toggle: Cheers, definitely a bug. I think it might have snuck its way in right before release, will look into that.
Plane preview disappearing: Could you post your Configure Direct3D->Window Updates settings and max version? I believe the general rule is we can only update the gizmo when the mouse is moving, but I haven't experienced it actually disappearing.
Please keep the feedback coming, people. Also looking forward to you getting your head around the new thinking and posting some awesome artwork!