I’d certainly prefer a destroyed-by-the-Snarl ending for Belkar to a redemption-equals-death one. I don’t think he’s nearly close enough to even
regretting the multitudinous amounts of murder, slave-trading, etc. that he’s done for lulz, much less genuinely repenting of it or wanting to atone, to be considered non-evil. Heck, I doubt he even remembers a lot of it (or remembers it with sentiments other than “Heh, good times...
).
But I don’t really expect Redcloak to get a redemption arc either. I would
love it if he did - not even necessarily becoming non-evil, just becoming on the same side as the protagonists, achieving his goal of goblinoid equality, and coming to terms with the wrong choices he’s made - but I don’t expect it. When you look at Miko, Tsukiko, and others, Rich is
not kind to characters who practice self-deception.