I solved my issue. You also have to get a level 50 character and purchase the ability in the legacy menu to unlock the Jedi/Sith movesets with 450 cartel coins or 250,000 credits, etc.

I can't choose the Sith Juggernaut moveset in character creation of a Jedi Guardian even though I have unlocked the Dark V achievement... Any idea what could be wrong?

Thank you for the reply. I hope the speculation about the loadouts comes true! Being able to switch from a Mercenary to a smuggler via a click of a button would be top tier. Oh and yeah, sorry about that, haha. I used Origin Stories as an example by accident.

Thank you for the reply.

Sorry if this has been said already but I have two questions... Anyway, will you need to change your gear along with the combat style you choose and change to? For instance, if I'm a Bounty Hunter and I change my combat style to that of a Smuggler, will I also have to change my gear? Furthermore, have the devs said anything about how many times we can change our combat styles with one of our characters? Once only? Cartel coin cost after that? Thanks in advance!

Not a good example as that Redditor choose the one class out of 18 that has too many buttons and the devs said they will be pruning when the next expansion comes out. Most of the classes have about 24 abilities that fill up two bars of 12 and then maybe 2 or 3 more but they are non-important buff skills, etc, basically not vital to the flow of combat.