After few days of digging into Yanfly's Victory Aftermath and Moghunter's battle result plugins I came to conclusion that it's beyond me to set either of them the way I want. I have come close with Mog's one, but in order to do certain things I'd need to re-write some stuff which I sadly don't know how to do.
My goal is to have a very simple window show itself during battle's end, and display the most basic of stuff (experience, loot, level up and possibly new skill gains). No icons involved, just pure text. Below I'm attaching a visualization on how I imagine it.
If anyone's got any idea how can I achieve this (even some kind of plugin with basic trial and error editing is fine), I would be grateful for eternity. Thanks in advance.