So what you are saying is that despite the game being developed - from the ground up - with solo and PG modes included, that just because the test release which was launched after the development of Solo and PG modes had begun, and that the test alpha launch didn't provide access to these modes (that were always incorporated in development, prior to alpha release), that somehow they were a later "add on"?
Interesting viewpoint, but not one that bears up to any scrutiny.
No, I'm saying that people who played those early releases might have got a different impression of what the full game would have been like based on their experience with it, which is a reasonable position. Not everybody follows forum debates and developer diaries.