@Poplar (also love the Sawako DP ^^)
To sum up, I think that's a great idea!!
Definitely a very interesting topic and a quick google search leads to many results.
You seem to be a bit confused about how the detailed study component of the speaking exam is actually like. It's a bit of a hybrid between a presentation and a discussion isn't it...
Maybe a simple analogy could be that that it's a bit like a press conference, where you front up and present some information to an audience and based on that information you get asked questions. But in the detailed study, the information you present at the very start is in the one minute introduction, which is what the examiners will base their questions on. (I probably confused you more D:)
Back to your topic, I think it's quite unique and if you research thoroughly, you should score very highly!
I'd recommend trying to find as many Japanese news reports on パリ症候群 as you can, I found them very useful when preparing for my topic. Also you should be able to find statistics, which would also be helpful.
You could structure it like, Introduction, Definition/Explanation of topic, History/Factors leading to Syndrome, Negatives, (Benefits? not any are there), Your Opinion, Proposed Solutions to Problems, Future Issues
I tried moulding the generic structure of a detailed study to suit your topic, but as I don't know much about it, you would obviously categorise it differently based on your research.
Good Luck!