I have found very large sites with all the .html files in the root to be a bit difficult to work with, but honestly, for
SEO sake, do it.
I have seen a page in the root of a website, goodboy.com/here.html have a pr6-7 and a page inside a subdirectory, goodboy.com/folder/here.html have a SIGNIFICANTLY smaller page rank, pr2-3 even though the page was older and linked well.
I know
PR is not the discussion here, and it is only a guide, but the logic makes sense...
If it is important, it will most likely be in the root...
My nickels worth...