The fact that people (reviewers) who LIKE TBS (4x) rate this game from 4-9 means (to me atleast) that they either have vastly different grounds of scoring OR some just suck at their job.
I haven't gotten it yet but have followed it since the first words about it were uttered and I will absolutely NOT get it at its current shape. Reading the following on this forum is enough:
Lots of abilities don't work
The A.I is incompetent
The techtrees are imbalanced
The factions are bland and without personality
Stability problems
The game is basically unfinished.
The game is not just played or reviewed 4 to 9 by players who like TBS strategy games, this game has an equal RP quest element for RPGrs. In fact, I think the biggest reasons for the disparity in review ratings are mainly due to two factors:
1) RPGrs vs strategy game players both bought this game
2) Players weight game functions differently, especially more so with 1 in mind.
I'm a strategy game player & I like city building, I also think AI is the number 1 game component. The AI in the game is extremely weak, in addition to the weak tactical combat system, which makes the game overall very weak (outside of everything else). Some RPGrs are not into strategy & couldn't give a flick about the AI or city builiding, they might rate graphics, monster diversity, hero design, the magic system, and the family tree thing much higher.
Otherwise, I totally agree with the points you made.