User blog:Boronbo/Leorio and his ability

hi guys,i don't read manga but i was watching leorio character page and i did know that he did use a ability on Gin so there is  some questions got in my mind:

1-did he improve as much as gon and killua because we could see that they are in different level now

2-did some one help him to improve or he improve by himself

3-do you think he will have a important role after the chairman election arc

(sry for my  language i know it's very bad but i think its understandable) ty and have a nice day