Some fx will impact render times 5 x when they're placed at the top of the fx stack (EG: neat video will be 5 times faster if applied first [top fx] in the effect control panel).

I suggest there will be an "analyze effects" or "Analyze Sequence for render performance". Once clicked the software will test a couple of frame renders of each clip and thus able to suggest effect stacking order for best performance.

Obviously with the help of community and ML the software can recommend some best practices on the fly based on it's knowledge.

User will be able to accept the suggestions, reject it, or test it (As on some cases the user will wish to preserve the original fx order because the order of fx can change the look).