There is no doubt that Wynne isn't liked by many. This is good for the Liberal party however.
This was posted to another thread, but shows that Wynne is being held personally responsible for most of Ontario's troubles. In this article, Ontario PCs are ahead of the Liberals, but only with Wynne as leader. Dump her and the Liberals can bounce back. This indicates that of the people polled, the blame for the depressed state of Ontario is clearly Wynne's fault, not the Liberal party itself. It's a shame that people think that, but it appears to be the case.
Struggling Ontario Liberals have shot at another majority if Kathleen Wynne resigns: poll | National Post
Wynne didn't start the financial mess in which Ontario finds itself, but she definitely contributed to it. As well, she really messed up with Ontario Hydro. I suggest that Liberal strategists have known about this for a long time and won't make any effort to separate her from what the public perceives to be "the mess she created". This gives the Liberals a good chance of forming the next provincial government. The crap sticks to her and she carries it away when she steps down before the next election.
Wynne says she will lead the party into the next election, but strategists know that is political suicide for her personally, and for the party generally. I'm betting she will choose to "pursue other options" and step down. Short of a miracle, she cannot be elected again. As a Liberal, she is a huge liability. Personally, she is seen by voters as the cause of all people's woes. Her departure wipes much of the Liberal slate clean.
While it is too early to see how this will play out. I'm betting they will wait until after the summer is over before the political maneuvering starts.
Another piece of the puzzle is PC leader Patrick Brown's popularity with voters. I cannot find the poll, but of the three party leaders, Brown held down bottom spot, even though his party was ahead of the Liberals. He is not liked by voters. This could add a few votes to the Liberal's chances.
It is too early to start predicting anything, but there are several things to keep an eye on.