Personally it comes off culty because everyone just believes in it. Even though their have been several attempts with a similair concept most obvious one being Genosha and look how that worked out. Emma is the only character so far who's pointed this out on page but everyone else is just so in it like a million percent without much reason as to why.
They all just have so much faith in Krakoa it comes off kind of creepy. Like Iceman has preached Trust in the Five like at least several times in Marauders. Also that's another problem with it no one on page has questioned their so called "resurrection" process. Heaven and hell is a real thing in Marvel it's established when these people die their souls have moved on that's just a fact until it's established otherwise. So everyone who's died is a clone that's just a fact and no one on page has mentioned anything about that little detail.
Theirs No DOUBT that's why it comes off as a cult on occasion. IMO