Since this is right after C9 won the major, and before coL/Rogue did anything of note, people should be more willing to join C9 than now. Shoot offers over at ANDROID/vice to replace STYKO. To replace tarik, get SicK/motm/Infinite/Zellsis. These are young, hyper aggressive fraggers that, with a good structure and good coaching (FNS and valens provide these things), will thrive and improve.
If you don't like the way the roster looks, you have the wrong mindset. Throw all of the major and previous achievements out of the window. C9 is in a rebuilding phase. They are going to take on a new identity. It's going to take a long time. You might as well gamble on some up and coming prospects in the meantime that could end up being major firepower for you in the future. If they don't work out? Try another one. It's not like these players are hyper expensive. Most of them don't even play for a real org (the MDL players sure don't)