I agree that people won't go away because of the increase. The increase is going to be icing on the cake. One of the problems we haven't touched in this forum with respect to brokers is the neighbor effect (pardon me for just making up this name). People don't like knowing the person next to them spent less for the same seats which has been happening all year due to the collapse of the resale market. Why renew for 81 games when you know the person next to you only had to buy the 5 games they wanted (or 10 or 15 or 20) and your neighbor paid less than you for 80% of games? Top that off with the pessimism of the fan base re 2018 success (personally I think they're more likely to do better in 2018 than to do worse or the same, but I could see how an argument to the contrary could be made).
Personally I know at least 8 people that have season tickets. About half of them got them new this year because they figured the Jays make the playoffs and they feared missing out on tickets again. They've regretted it since April. Unless you have tickets that are the best in your section it is a lot of work to move the ones you can't use. Even with my row 1s they soemetimes go unused. I've donated a bunch of tickets this year which I actually like doing (I did last year too, but it was premeditated whereas this year a lot has been tickets nobody wanted). So many games in baseball means most people use less than half their games. In a good year it is hard to get rid of 40+ games. This year has been a bad one and people are hurting. If it has been bad for me with first row 500s I can only imagine the experience for others.
If you look at other forums, twitter, blogs, etc... the overriding sentiment I have seen is that a lot of people weren't planning to renew regardless of price. This is the cherry on top.