The new version has only one keyframe, when calling an keyframe-effect (e.g. volume). I recommend two keyframes. If I use an effect with keyframes, I want to use both of them and not just some gain, there are simple gain-effects and if I want it simple, I can use those.
In addition I suggest the two first keyframes to be fixed at the beginning and the end of a clip, the possibility to shift them away from beginning or end is high and that produces bad effects. I see no reason to shift them away.
This is a proposal from a professionell editor ...