There's a substantial chunk of fandom which really goes for the Leia, Jedi Knight revision - lots of fanfiction. Personally, I prefer Leia as she is. Luke is pretty much an ignorant farm boy and crack pilot who ends up picking up knowledge and wisdom as an acolyte of the force. He's a good commander, but it is clear through the fandom that the title 'General' is pretty much honourary beyond his talents with light ship squadrons like X-Wings.

Solo turns out to be a gifted strategist - not on the level of Ackbar, but still very good - and has the unique gift of unpredictability as a general.

But Leia is so much beyond the both of them in terms of her skills and talents. She's a gifted diplomat, an effective administrator, a natural leader in the political and inspirational sense. She's shown to be equally adept running small outposts as she is welding together fractious groups with individual mandates into a single purpose. As the canon goes, at one point she's the head of state of the New Republic. Turning her into a Jedi in a way diminishes that as her training would require her to effectively leave the Rebellion during their most fragile time.

It would be fun, but Leia's uniqueness is in part based on the fact that she has the greatest responsibility of the three titular heroes.