The only "kindle" MC mentions is that "The kindling was there already, but I... I was the match. And now..." which is in reference to the start of the conflict in Act Three :)
If you got all the girls up to level four love (except for Morgana) and did all the side-girl content, and maxed out Authority in the College then you should have access to all the content as it's revealed in Act Three, so no worries!
There are some "wrong" choices that you can make, but I will always make sure that there are ways to undo the consequences of those choices if you're clever :)