Whose theorem is this research based on? "Should" covers all manner of sins, doesn't it.
I'm no coder, I don't know that for a fact, and I know that some things such as ScummVM seem to compile just fine on MorphOS without any tweaks to the code, where as on AROS...
...well your guess is as good as mine.
It's their property now, they can do what they want, but I just can not imagine that porting something from one OS, to an OS that is heavily based upon the original, could be all that much drama in the end. If they want to expand their market base, they owe it to them selves to at least take a look. At least I'd hope they are thinking about the whole Amiga community, and not just users of this Amiga flavor or that.