They should remove them if NRG flops in Split 2. I think it's alright to keep them for now since they have chem with the guys joining. It's less risky than getting 2 new guys mid-season
They do just feel like the problem. I honestly think if you get rid of Victor and keep Demon1 the role issues are probably fixed, which sucks because Victor has honestly been playing really well. But I'd take Demon1 over Victor in this scenario tbh
S0m would definitely help him entry, realistically another person would probably also have to step up (probably Ethan), but yeah it's not perfect. Also defensive duelists can still definitely work, Cryo's a defensive duelist and he's doing great, it's just all about how you use him