If Riot again make CIS separate region it's scene gonna die. Majority of CIS gamers hate Riot games for making better MOBA game than their beloved DotA. I dont know how many years have to pass untill this stupid "crusade" against league and Riot would be over. Without interest from kids there wont be any fresh blood for esports. Teams will face stagnation and will slowly become tier 3-4 trash.
On the other hand if Riot make CIS teams play in EU it will be great motivation for current teams and for future players who want to become pro. And CIS players are Really talented in FPS games and have huge legacy. No one can deny that. Right now Gambit could maintain top 5 EU spot easily and Forze could be top 10. Other teams have potential too, may be with some tournament experience or just reshuffles.
Why Im not including TR here? Lets be honest Turkey went all in on Valorant. I believe its most popular game in Turkey already. Surpassed LoL and CSGO. TR scene is huge and talented as well. All they need is to hire some EU specialists like analysts and coaches. And in no time TR would be competitive internationally even if they would be separate region.