Toronto is using out-dated transit signals. The MTO only allows the vertical bar, at the moment. There are diagonal bars for turns and horizontal bars for stop, but the TTC is forbidden to use them.
As for transit priority, sorry, the almighty single-automobile turning left must get priority over the 100+ on board the streetcars. So says the automobile disciples at city hall, queen's park, and their bureaucrats. We could use lagging left turn - A sequence where the green left turn arrow is next after the oncoming thru green. Sorry, that would confuse motorists used to the leading left turn - A sequence where the oncoming thru green is next after the green left turn arrow. Can't use a "NEW" sign with them, because who actually reads signs.
In addition, the single-blade track switches are cheaper than the double-blade track switches, because of budget constraints. There is no money for public transit operations, but there is for the roads used by the single-occupant automobiles.