I haven't read throught any of the post completely, so excuse if I write a thing far evident by now.
The story is already shot at Mysteries of the Sith, it just had a few other branches and focus. Outcast had far better story.
This 'Get to the sith temple(or anywhere else), where unlimited force is located' is VERY boring, and it is full with exegenerations.
But at least its difficulty is not exegenerated. It is easy. It is an advantage. The best thing is that all force powers are available in Single player, and are switchable. So if you no longer has use for one of your force powers, you can disable it.
The WORST mission ever designed was the one when you had to ride a Swoop(Advanced Speeder). Its difficulty is quite exegenerated, and the swoop is UNCONTROLABLE. The rancor reborns is quite weak. Additionally, every second of my enemies is a dark jedi. Exegeneration again. Light jedi with Sith(dual-bladed) lightsaber? Ehhhh .... no comment. We are playing light Darth Maul.
Didn't try the multi part yet, so I am talking about single player about 'being easy'.