Ah thank god about the CHA thing. So it just uses your highest mental stat?
Jesus christ I can't believe you get those benefits passively. That's huge. What does activating them even do, then?
It does not use any mental stat, only your MR. Mythic spellbook was using highest mental stat in the beta, but they changed it to MR and that is how it stayed, afaik.
You can only apply limited number of Aspects to your Demonic Rage, so it an only Rage-specific parts of the Aspects that are changed on the ability panel.
Barring the annoyance that my mounted pouncer can't surprise charge half the time due to glitches (after charging she halts halfway to the target and begins the fight in a surprise round with a standard action unable to charge), it is severely crippling that she often doesn't get the Spirited Charge x2 bonus.
Owlcat fixed Spirited Charge recently so now only first attack gets x2 multiplier, if you Charge with pounce. Here
discussion.
There is rule that you get Standard action in surprise round if you WIN initiative roll, while your enemies get none, they skip their turn. Maybe that is what is happening to you?