Perhaps, but consider 1. how many other Makuta wouldâve considered doing that themselves, and 2. how many wouldâve succeeded.
Spiriah was mostly viewed as a joke by the other Makuta, even by those who were even more incompetent in comparison. Mutranâs shreds of his sanity were mostly held together by devotion to Teridaxâs ideals and his bitter rivalry against Chirox, but assuming he could hold his psyche together for long enough, both he and Chirox would probably have a pretty good chance of succeeding where Spiriah failed. Itâs quite possible Miserix also could pull it off, if that had been one of his interests.
While Greg says that, we have a case where what Greg says separately and what Gregâs already written do not line up. Iâm guessing just by the likelihood of it that the initial question was in reference to Miserix banishing his inner light, probably wondering if that made him any worse than he already was.
If we take a look at Miserixâs existence, we can tell not only was he not a fan of conquering the universe, he attempted to electrocute his most trusted lieutenant the moment the idea got brought up, with barely enough time for the concept to be explained. Being a Makuta, he possessed more than enough power to wipe out most of the people in the core processor, yet he barely utilized any of his Makuta-specific powers despite his clear willingness to use and abuse them in other circumstances. Many of his powers would also not risk damaging the core processor, such as darkness, slow, mind reading, and so on.
Heâs also not nearly as much of a braggart, as practically every other Makuta (only other one I can think of is Vamprah, by nature of him never speaking) would happily plunge into a monologue if given the opportunity.
So while not necessarily a well-rounded role model or even that morally confined, Miserix undoubtedly had noble intentions at heart, even if his methods and outlook wasnât the most humble. Gregâs just wrong on this one 
Krikaâs much more of a bad guy gone good, someone who deeply regrets a lifetime of evil and desperately wants to undo some of the harm heâs caused. Looking at the totality of his actions, however, we have to take into account all the evil he either directly participated in or at the minimum validated with his presence. Fear of reprisal kept most of the brotherhood in line, and itâs what kept Krika in the system of evil he so frequently upheld.