the idea that tolling the I-5 bridge would cause so much controversy is amusing to me.
Tolls will not pay for the bridge, but they will generate a lot of revenue. In the era of the FasTrack electronic pass, long delays at toll booths are generally a thing of the past. And, most importantly, tolls create exactly the type of incentive to car pool, use light rail, bike and so on. So, I think you should definitely toll the I-5 bridge.
However, if you are going to toll the I-5 bridge, it is hard to see how you leave the I-205 bridge without tolls. Of course an equilibrium will arise where congestion on the Glenn Jackson bridge will be a toll of its own, but this is a toll with a large externality whereas a monetary toll is not.