Alright, then perhaps the idea that inspired this will have to do; add a feat that gives you access to these.
It would have to work like this;
Select feat at (point in game you prefer). Gaining one feat blocks out all the others (e.g. Sith Mage, Prerequisits: Jedi Consular/Jedi Sentinel, not accessible by Sith Sorcerer)
The feat itself can give a boost of some sort if you don't want it to be an idle feat.
Also, you could have the Kingdom Hearts and inFamous inspired powers as feats, and add them to a new non-force user class (conduit and Keyblade Wielder).
It is better to have it and not need it than to need it and not have it.