The answer is simple: they make more money keeping them separate. I, too, prefer the BNA search facility to the newspaper one on FMP, but it is significantly more expensive to have them as separate subscriptions - especially after the 25% increase in the BNA price in two years.

It's frankly crazy that the two search engines are so different - as I understand it, FMP & the BNA are the same company. I see your suggestion was 'Pending - for future development' nearly TEN YEARS ago! Needless to say, nothing has happened in the decade since. All the BNA's energy goes into uploading new pages - as far as anything else is concerned (e.g. improving the terrible OCR), they avoid doing anything. I didn't mind so much when the price was stable, but with recent price hikes it's sadly time to leave, and try and make do with the FMP version.