I did not see the monorail and Ferris wheel in this set of plans.... other than that, this is a Ford kind of proposal. Flashy, a bit trashy.
I don't think this can be stopped. My objections are mostly ethical, and I for one will be forever mad at Ford if it becomes a piece of trash.
I will say having Science Centre type of activities at Ontario Place can work and can be a really good reuse for the pods. The Cinesphere is better than the OSC IMAX. Using the dome had that weird distortion. Also, the Cinesphere can play both analog and digital/laser Imax.
The Bud Stage has terrible acoustics (it can be really harsh on the ears) but a pleasant outdoor atmosphere. I won't miss it. People like coming to the concerts so I think the new stage will be popular. Now, of course, it is Live Nation/Ticketmaster, whom I truly feel are evil.
The Therme proposal is the hard part to swallow. I do like the new large public beach. For what, a couple of months per year though? God knows, the O Place management and Ont govt completely mismanaged the old Kid's village and water play area. So I would hope Therme can do better. The suggested prices are going to be expensive for a lot of families.
The adventure play area should be popular. People like the Montreal setup.
All in all, it is a decent stab at restoring Ontario Place to relevance as a tourist attraction. I took my kids to the old O Place for many of these activities, play/ water park, and kayaking.
I hold the same objections that most do: public space turned over to private interests, little 'Ontario' content, no public involvement, dubious planning, overly commercial and so on. We can't compare 70s ethics with 2020's ethics. I do not favour turning the space into passive parkland, though either. The location is good for downtown families to use occasionally for an activity day, as opposed to going out to facilities in the burbs. Making it usable for more months is possibly good economic sense, although the climate can be brutal in winter.
I really think the current OSC facility has potential as an environmental/nature museum, being located in a ravine, and all. I never felt like that was part of its purpose, which was being a cheerleader for science. Of course, the Fordites are allergic to environmental causes.