Being able to programmatically write automation values for all or a selection of parameters would be a huge time saver not only when working with Beam, but also when dealing with any sound-based device in Live. Unfortunately, Live’s API does not currently expose functionality to edit automation breakpoints, so it is not something third-party developers can make a M4L device or an Extension for at this moment, you should ask Ableton 
As @tdk mentions, next best alternatives would be to use a preset morphing M4L device or use Beam’s native mixing/merging capabilities - I’ve discussed these in my posts here and here, along with the last part of this video:
I don’t have a good recommendation for a robust preset morphing M4L device yet (great to hear you’re working on this @tdk + I’ve heard rumors about one of my colleagues seriously exploring this area), but we’ve just shared a new Beam for Live Alpha build today that adds some functionality that makes using Beam’s mixing/merging capabilities a lot more powerful, including for something like morphing between different moving head positions. Anyone interested in testing this before we release it is welcome to sign up for the Alpha Testing.