Yes he is. Rain has a higher skill celling and so does Niko, GuardiaN is inconsistent but better than Olof in his peak and in his lows. Flusha is a decent IGL and a good fragger when motivated, IEM Katowice is the proof.
After katowice all flusha did was failing to prove his place in the team and that's why he was benched and have never played really nice since the tournament