The "Fnatic is boring" narrative has not been valid since early stage 1 this year.
They probably have the most number of real and fake comebacks this year. It's not over even when they are 4-11 down.
They have innovative comps on a lot of maps (even two comps on some maps). They played Deadlock on Ascent, Clove on Bind, Yoru on many maps, and Iso on many maps. Even historically they have been innovative - they popularized the current Lotus comp, the half-shield meta, etc.
Edit: They also play a lot more aggressively on defense; just watch Haven against G2.