Functionality of the wiki
I think that the lack of a text editor with more advanced functions means that the input should be kept as 'clean' as possible. Hence it is important that large chunks of text from Word documents are 'cleaned' (of rogue html characters) before being entered. This process will mean that bullet points etc. can be correctly formatted - complex tables though will remain beyond the reach of this simple editor to do deal with.
However, in any case, I think it does not accord with 'good practice' to have large amounts of text to read on screen. Rather than sectioning large reports it may be better to seek to introduce them in one or two paragraphs and then poin to the reports as pdf or word files. This also means it may be helpful to point to things stored both within the wiki format and in the index folders.