It's my second post here, so maybe this time I will take the time to say hi everyone! and to say stuff like : this site is awesome dudes , I've been lurking for I don't know like three years and, also, I hope you don't mind people who reply to a topic like one month later.And writing in english...
Maybe it's because he was killed by another apostle. Because with all the apostle slaying we have witnessed thanks to Guts, it is kinda weird we never saw all that stuff again, although it doesn't rule it out like you demonstrated.