It is at least something. Rapid transit stations are kinda special (compared to streetcar stop) in that they are clearly defined destinations/wayfinding points, and people are able to tolerate greater amount of walking to reach them without thinking twice about it. Especially when visitors' trip purpose is fun & leisure rather than commuter.OL will terminate where Exhibition station is - it's bit of a last mile problem that it does not resolve.
The way forward I believe is to make the public realm and walking experience as hospitable and pedestrian friendly as possible between Ontario Place and the Ontario Line Exhibition station. Therefore, I do think that Ontario Place needs to be master planned alongside the Exhibition grounds, and barriers like Lake Shore Blvd W addressed.