I assume plans based on this will never work. AFAIK they haven't once in the history of the quest.
If there is a clear and convincing reason to think the TS would be able and willing to help I am fine asking them, in the absence of one, I am not. We are on thin ice with them.
As for the rest, don't worry about it. If someone takes the time and effort to WC optimize the plan, I would make an effort to fit additional stuff in. But I don't appreciate when people ask me to do an entire additional scene without realizing that that's 45min-1hr of work at least. If I can fit it at all.
I think also people don't often appreciate that their pet projects will not get done if we don't divert a significant amount of WC to them. The amount of QM investment in our ideas is largely correlated (although not perfectly --this is abundantly true regarding prep days) with the amount of WC we devote to it in our plans.
So if I do a quick one off bullet point of your idea, the QMs often don't notice it or care to engage with it, this usually looks like -- "the speech was done offscreen, the team seemed to appreciate it", or "the Toad Sages weren't interested in helping and seemed confused and angered when you asked them about it"
So it's happened before that people ask me to put stuff in and I say "there's no room" and they tell me it's like a 10 word bullet point at most and etc etc
If you want a scene where we send some peeps to look for the Scroll, that sounds cool. I think it could go in the next plan.