Koalanoob is the best Awper in NA. He's on the same level as Aspas when awping. He doesnt need to replace anyone next year because the entirety of M80 is entering franchising next year through ascension.
Trust me when I say they will become a top 4 NA team instantly.
johnqt can easily replace stellar or pancada (pancada deserves to play smokes and not be stuck on kj)
valyn is better than boostio but I wouldn't replace boostio because of the synergy he already has with his team
add3r is a better sentinel than pancada, pancada deserves to play smokes for another team
trent, brawk, and eeiu can all replace derrek
flyuh is better than most franchised players but there's no team that has a spot open for his role right now.