+1 for me too.
I feel like Fusion is problematic (both the Resolve & Standalone version) from the very start you open it.
There are things I just don't understand as choice like having this "keyframe / spline" windows ridiculously small when what you do is review a timeline like Editing.
Imagine for a second your cut page or Edit timeline be very narrow, everyone would think that's unpractical.
Then there are things, I have very hard time to understand wether it's legacy stuff (I come from a NukeX background so can't say if these were present before)
-By default the zoom/pan control with the mouse is such a pain. I always tell student to fix this in the interface (preferences) before doing anything because that's how 99.99999% of the softwares work in the world (beside Fusion apparently). For a beginner who might want to hop in the compositing train is very counter-intuitive and may scare them.
-The fact the node do not snap by default, I think snapping between each other would be nice as a default in the interface. I also would LOVE to have this feature added into Resolve Color page (than & sticky Note + underlay + better node management in the graph cos complexe color pipe can be a real pain to manage).
Now about the window, to me, the only interface that's working correctly for my workflow now is the one added in Resolve 17 (and magically absent from Fusion Standalone) of the Vertical node graph that has the interface configure pretty much like a standard with enough space for keyframes, a large enough window for monitoring and a node graph next to the dedicated options so you don't have to constantly go back and fourth and zoom in zoom out the interface (especially with this awful default control) like this:
I'd really want this to be part of the standalone for a start, it will not fix everything but this will be a bit better than the infinite chunkiness that the floating window provide which isn't renowned for its "crash-free" usability.
I understand the philosophy to have the interface locked so Blackmagic can focus on the control surface for the user experience but, as of now, compositing is done with a mouse or a tablet and it's not about to change that soon unless you bring mind reading to the equation.
Since there are no surface, the benefit for having a fixed interface is close to 0 but the handicap is enormous when compared to the competition (or the former version of the software when it was under eye-on).
I find it very difficult to use in production, not because fusion is hard but just because the interface is set up in a way that's not optimized and non customizable.
I also always prefer to teach for that reason Nuke instead of Fusion first because students had time struggling with just getting the interface to behave correctly for a project which meant less time for actually doing anything in compositing.