I dislike Mon'Star. He's a fairly generic terrorist that draws upon the tired old "genetic experiment gone horribly wrong/superhuman" concept without innovating. The story itself has no sense of proportion - Mon'Star kills absurd amounts, his powers are illogical and frequently inconsistent, his actions aren't motivated by any form of comprehensible reason - and Mon'Star is one of dozens of characters here that twist and harm the Outcast character model. Mon'Star fails to tie into fluff or canon in any way, he receives the standard portrayal as a god amongst men, and his name and star scar are cheesy. Sort of like a B-rated sci-fi movie, or like that Pokemon movie years back, the one about Mewtwo I watched when I was seven or so.
Yeah, not my type of story. No offense meant, of course, and I have no doubt your role/gameplay is sound; I merely dislike the character's concept and exposition.