The time given to capture/defend a planet varies depending on how successful previous wars were.
My point behind starting this topic was to attempt to discover what was happening with this trophy. After all is said and done, I have no better idea than when I started.
Perhaps what does come through is that the HD experience is individual. What works for one player does not work for another, and what is easy for one is not necessarily so for others.
Because each player has a unique experience with the game, general conclusions tend to be elusive, at least when it comes to matters like SSE.
I find it interesting that the game has this dimension, that it can be so individual of an experience. Ostensibly simple, HD is actually quite sophisticated in it’s effects.