Yup that’s the issue, ok planar for sketching.
Could I sketch on non planar and then detach the curve from the surface to edit?. Most times I don’t need/want it permanently attached to the surface anyways. It just makes adding details much easier as you don’t have to set up sketch planes and readjust curves to the area you wish to detail, having them more or less fully aligned to a surface removes a ton of manually editing to align after.
Maybe sketch on non planar surface > select the curve > press on the copy button > drag a copy off the surface > delete original >then id have a curve that I could edit that wouldn’t affect the surface, but it’s aligned.
Last question, will it be possible to sketch over multiple surfaces?. So to build complex surfaces I need to break them down otherwise the generated surface can be low-poly and render sort of messy. But by breaking into multiple parts I have control over the way it creates the hull, by doing so however I can no longer sketch over more than 1 surface, So a car chassis that has “visually” 1 clear body, but it’s comprised of many surfaces, I won’t be able to draw over them seamlessly. So if I wanted to draw detail lines crossing an object or many surfaces they won’t draw past the one surface I selected. To acheive a similar effect I’d have to draw over the top with. Sketch plane aligned close and Snap curves back onto the surface 1 by 1. Doable but way longer flow. If not possible now could be a great idea for the future.