Current 503 bus service is not indicative of the previous (the 502 and 503 before they were bustituted) or future streetcar service patterns, because I guarantee that the current service pattern we see on the 503 will be significantly different if and when it returns to streetcar operation.
the 97 has 15-minute service frequencies, not far off from the 514 and the 502.
You don't have to schedule closures of the subway when a streetcar diversion occurs.
99% of riders will take anything over a shuttle bus.
Where else do you suggest we put new streetcar lines then? Parliament, Church, and Coxwell don't count because the tracks already exist for the most part.
You don't need to replace 3-4 buses, 2 is adequate. Blue night streetcar lines don't have more than 5 people on them most of the time, why should a Yonge or bloor streetcar be any different? Even with 3 buses to one streetcar, it's a 10-minute wait at most. With 2 buses to one streetcar, it's a 7.5 minute wait.
Perhaps that's because the 501L is poorly laid out, has a bunch of speed restrictions, and has fewer passengers per vehicle, requiring fewer stops.