From a technical/app perspective, Obsidian can handle this easily. The core of the app is connecting markdown files to one another. So, assuming you feed the app your ideas and references in an orderly fashion, I’d think it’s great for a final phase of research. For, me, I’d then go do my writing in Ulysses. It seems the question for you is do you have some good organizational best practices within the app. For that I’d recommend you read up on MOCs (map of content) and think about how you’d use tags.
Check out @nickmilo starter pack for examples of MOCs.
Also: A case for MOCs