I don't think it is okay to write seemingly plainness. I think you should write "seemingly plain nature of..."
Well, this is not about whether or not the writing is plain. Business writing serves a purpose that is altogether different from fiction. Your job is to philosophize a bit to yourself and decide on an answer to this specific question. Is it more important, less important, or of equal importance. For this, you need to determine what is most useful and crucial in the business setting... what purposes does writing serve in business?
As for an additional info page, I don't know what you mean!:-) Can you explain?