League of Legends (LoL) Question: Kha'Zix All The Way Up!: Would it work?

Since i see lots of people on mobafire and not mobafire-related people going for a solo champ throughout all their ranked journey just cause they want to carry with it/improve their skill with it and sometimes it works even in ridicolous cases, and since i do want to improve a lot with kha even after the changes he got(whatever they were bad or good at some points) i wanted to ask you:

Would using only kha in every role wherever i go work in anyway? to climb/improve my skill with him? or the champ just isnt the right choice?