Yes, MP Soundwave was a complete surprise to folks in the know which is the scary thing for 3rd party MPs. That surprise and the lengthy development a MP needs, all give weight to the idea that Soundwave was mostly ready for production and was purposely bumped up the release schedule to compete with Acousticwave at release and MP Soundwave totally sunk Acousticwave. Even though Acousticwave backed out very late before production began it probably saved them more money than if they had fought the official release.
So how many more official MPs sit at this advanced design stage? And why Quakewave and Hexitron (to a lesser extent) was not a victim of the same tactic? Maybe some 3rd party groups get better inside information than others?