The biggest hurdle to saying a knight level character is a fully trained Jedi is probably the Reflect and Parry ranks it takes to be close to how the Jedi in the movies and shows behave. They flat out step in front of their allies to deflect incoming fire back at the enemies with high precision while wearing robes, and even Padawans are capable of doing this. You'd pretty much need several trees worth of lightsaber training to be that good.
But they don't always reflect the dmage back, often they just block the bolt and send it somehwere else. I think at least some of those deflections can be cleverly narrated misses by the shooters. It makes more sense given the game rules on parry and reflect. But they sure do have quite some parry/reflects ranks (more reflect probably) and a high strain. (To be honest we mostly see the better combat trained padawans and jedi, remember how many jedi failed their reflects on Geonosis)