Considering I'm already in Early Access since the 13th, and have my Digital Deluxe Edition pre-ordered.. yeah. I'm most definitely already hooked to do so.
If you loved the KotOR series, you will likely enjoy TOR. And personally? I think they chose well to make "KotOR 3" and beyond an MMO. A single player game set in the middle of a galaxy wide galactic war doesn't really seem to make sense at telling the entire story, considering how many people and the events those people are involved in there are in play throughout the entire ordeal. The "One hero to defeat the forces of darkness" plot that the first two single player games had doesn't feel as in place as "Many unique, somewhat normal hero's fighting everywhere to advance the interests of their respective sides, for better or for worse" does.
Granted, the finale of the entire story of the Galactic War Setting does revolve quite a bit around the eventuality of the Jedi Knight defeating Vitiate (as foreshadowed to in "Revan"), but it takes more than a lone Jedi Knight and his/her companions to take on an entire Empire (Revan/Malak's Empire was more like a large roaming fleet centered around one key device rather than a galactic invasion army with multiple seized worlds for grounding) AND create a well-rounded historical story, no less.