ah well, the same argument could have been made for NA in most season, as they really didn´t put up much of a fight in many years and still got three seats. right now seeds are mostly oriented on the popularity of lol in the region, not so much about the skill of those regions - to change that making one seat dependend on the MSI wouldn´t afford too much, but would add a lot of frustration for a team that loses its place because the #1 deceided to screw up (like G2 did this year, they clearly didn´t do any proper preperation) as they could afford to knowing they would end up #1 or 2 in summer anyway.
So what would be fairer would be prolonged international qualifiers for the lower-class teams world wide and a more Dota-ish tournament. Or at least stacking up teams to 20 so every "main" region could bring 3 top teams and more wildcards/lower placed teams could fight it out to also participate as the underdog.