That's a lot of strawmen in this argument and assumes a ton of negativity. Honestly, I'm just going to repeat of few points but it is clear to me that there is no way past this besides agree to disagree because the emotion has pushed so high as to be irrational and I'll not address every single "What if?" that is being presented. It's absurd.
As I noted in my post I said Kes would eventually go back to Ocampa. I see possibility there. I see growth there. I see potential and opening communication so that the Delta Quadrant isn't just the wasteland to the Federation but opportunity for exploration. But, I stand by my opinion, largely because there is a series coming out that is about exploring the Delta Quadrant. To me, it is a ridiculous assumption that writers will never so somewhere and therefor we should not make a decision regarding this character except to maintain status quo of keeping her on Voyager.
Sorry, I don't see it as Kes sidelined. I don't see her losing out. I see her taking experience, learning in the Alpha Quadrant and returning to Ocampa to teach. If that isn't growth and development and exploration then quite frankly I do not know what is.
I have to say, I am a fan of your idea (think it was you) that Kes going home could also lead to the Ocampans eventually joining the Fed.
I also figure that if Kes has the power to ping Voyager back home, then simply rock up back the other side of the Depta Quadrant that it wouldn't be a lot of effort to then simply appear on Earth as and when she pleases to then remain a part of the story/kick off a new tangent