I'm not saying Moyra and Zevdala are the only choices. It's possible others could be good co-leaders as well. Deverim might be a good choice as he appears level headed. Also, having him stuck in that tower overseeing the EDZ seem like a waste of his talent and experience. Unfortunately, choices are somewhat limited. I don't really trust Gambit or Lord Shanx to prioritize the greater good. While the Saints seems like a good fighter, his connect to Old Silas would probably lead to the same poor behavior/bad judgment as Ikona. Banshee and the weaver robot would like be ok, but they would need constant checks to make sure they had not hacked and made to push for things not beneficial to us. Probably best overall not to have robots in charge.