When the same region wins over and over, it steals excitment away from a tournament
Because the results of the tournament become too predictable.
I am not saying SKT should be banned from league tournaments because they are good (thats stupid, that'd be like banning a basketball team for being too good).
I am saying that if SKT weren't participating the tournament would be more interesting because it would be "anybody's game" again, at least moreso than it is now.
There is just too much of a skill gap between the different regions. I think RIOT's strategy on this issue was to let people's competitive nature close the gap, but apparently that hasn't been enough.
I don't have any answers, but I'm still making this thread because perhaps you do.