Jedi Knight Luke Skywalker should have a "Rebel" tag.

This has been an argument since his release. The reason they did it was because of balance. They didn’t want him on a CLS team.

the same is true for Jedi Training Rey, or Rey (GL). They definitely should have a Jedi tag, but they didn’t want them to be teamed up with the powerful Jedi like JKR and others.

Probably better to give him a new republic tag at this point. 
We need to figure out his full team at this point. With the era system being the way forward for new toons, I doubt we will see EU jedi for a while, but I think a good team would be from Solo kids, Corran Horn, Kyp Durron, etc

They could modify his abilities through conditioning to balance it out so he can have the Rebel tag without making him overpowered.

He doesn't become a Jedi until a few minutes before Palp dies, the DeathStar2 blows up and the rebellion is, essentially, over, bc the Empire is over. The struggle goes on, but the Empire/Rebel frame disappeared within  minutes of LS throwing his lightsaber on the floor and declaring himself a Jedi like his father before him. 

Check out the timestamps in this clip: at 34 seconds he turns off his lightsaber. At 3:06 Palp dies. Most of the time between Luke is writhing on the canisters or the floor from force lightning. 

He might have been a Jedi before Palp died, but from the time he became JKLS to the time the Empire was over was less than 3 minutes, it's all on screen, and he didn't do one second of fighting.

If JKLS is involved in a fight, you know for a fact it's after Palp died -- and with him, the Rebellion. 

Clip, sorry: 

https://www.youtube.com/watch?v=PqaiKmm8gsY