Definitely the signal changes that you suggested would be helpful. Dedicated signals that reduce signage clutter are much more clear. And near-side signals for their safety benefits too.
I am concerned about the people making left-turns on a red light though, that's just unacceptable and I don't think we should make more concessions for red light runners. The other factors you suggested could definitely prevent this from happening.
For example, on Adelaide Street where the City has activated new protected left turn signals. I fully saw people just driving through a red light. I know the typical argument is that they're "not used to it" but, it's a red light, it's in the HTA, it's in the driver's handbook. Why is it that driver's get a pass for doing something illegal.