There are no doubt many things that Vegas Pro users want added into the software and I know that it's impossible to please everyone. But here are two that would seem reasonable and relatively easy to add in.

1/ An upgrade to the screen capture setting to allow for changing of fps and different quality levels (Low, Medium, High)

2/An EFX for AI speech engine, with, male, female, (American, English, French, etc.). This would be good for those who produce travel blogs but don't want to use their own voice. There are some speech engines out there now that are very hard to tell that they are computer generated.