It would be nice to choose which effects to be added to the videos cause for example sometimes slow-motion for last kill doesn't work or another example is music during a zeus kill (Personal opinion).

A button on the clip to be able to re render (could be called edit or something) this would be useful to be able to fix clips that have any issues with them (bugged audio etc) and also to be able to change the effects you used for the clip

It would be amazing if we could edit the clips again and change the effects and then render the videos. Of course we'll be patient. :)