It does because you can play a lot of heroes and they don't know who to ban. There's no guarantee but you have higher chance to win because you've got a large pool of heroes.
It's an advantage and whoever is playing it really can enjoy the game itself even if it's the most crucial part of the series, there's always a way for someone to enjoy the game and play confidently if he got those heroes of his.
Thats how should a game would be on which it isnt really just being too competitive or turns out to be pressuring you but rather you really enjoy on what you are doing or really likes to play and you could really see it on Team spirit and just like on what carlfebz2 said above is that having a large hero pool is something unpredictable and does signify that their main core player "Yatoro" do really enjoy on what hes been playing
because it is just quite tiring when you do just focus on single or couple of heroes and this is what i do also saw to be a huge advantage.
All of them have large pool of heroes and that's their strength and with what they've been doing, it's been effective to them. Their run was one of the best because during group stages, they're at the bottom and they're about to be eliminated but they did well on rising through the playoffs and won against with those strong teams including those teams that has TI champ winners including PSG.LGD who has TI champs too.
LGD didnt really able to able win TI ever since but they have able to get that runner up position which that recent ti10 on where most people do believe that LGD would got it this time but they do failed up.
Team spirit was the dark horse on this competition and never one in a million chance that people had been anticipating for this team to win considering that there are lots of teams which are more better
and known to be previous champs which we didnt really expect that they had able to pull this off on this year.
Yeah, Team Spirit just master the meta for the current patch. Magnus was not that popular before until collapse use it on pos3 and use the skewer perfectly on all of the crucial part of the game. Team Spirit hero pool is so vast that's why they can easily counter and develop a quick strategy during picking period. OG has this same characteristics, the only problem was they are over confident on experimenting heroes without thinking the possible cons in case they didn't manage to use it properly. I think this is the reason why torontotokyo TT them after they sweep them is because OG is using an experiments strategy against while they are seriously study and practice the current meta of Dota2.