Monkey Fist was the mature villain imho and Ron did kill the Lorwardians, as a matter of fact.
haha, yes. in the craving for new content, folks seem to forget some of what we already got.
let's start with Graduation. and...i want to back up to Clothes Minded actually, because it will always bother my scientific mind that that gets glossed over. and this cements the show even more in the cartoon world... Drakken can't just move the continents. and the flip of a switch can't un-move them either. do i still love the episode? yes. but...it's not. real.
so then in Graduation... Kim's house is destroyed, the entire world is invaded by destructive robots... the final fight we see implies mass devastation by said robots... Ron's heroism saves the world, but...since we're so used to the cartoon world that is spelled out for us again and again...none of this feels all that intense? or not as intense as it should. not till the very end when Shego appears to be badly wounded (but then just gets up again fine later i'm still miffed about that) and Kim is at their mercy do we get that sense of.... okay, this is serious now. and Ron does kill them, the creators confirmed it... but it doesn't have the weight i think it should, because...the show just hasn't been very weighty. and that's okay. KP is KP. don't like it, write fanfic.
but now... Monkey Fist's arc was....i'm gonna call it the closest to BTAS that we got in the show. i make that references because anyone who has seen that show knows... BTAS was full of real-world tragedy, injury, death, themes of loss... themes of people willing to throw it all away for the sake of their desire... over and over again... Monkey Fist was just that.
i mean... it's only fanon and headcanon that MF was restored. for all we know, he's dead and gone. turned to stone for all eternity. you can't get more real world than that. plus, that final episode of his... the threat of death to Kim and Yori and everyone from being turned to stone... for once...FINALLY...easily more than in Graduation (for me at least), we got that sense of real threat. that sense of...maybe the heroes aren't gonna come out and top and we're not just bouncing back to the status quo after this ends. finally, this is serious.
so, yes Anon. Ron did indeed kill the Lorwardians, it's just kind of...overlooked as they hurry to close out the episode and give closure to all the main characters. and MF was in fact the mature villain of the show. he was our Batman villain.