You would end up making images of most of the pages in the book.
Tables are handled reasonably well by fine reader, if you go through the book page by page and see how Finereader has handled them. There will be a number of pages where an obvious table is handled as text. You right click on the page display and delete all the areas, then click on the table button and select the table area, and repeat for all pages. Ditto for pictures too, with the pictures button . Then read (recognize) the book and it should do better.
Finereader will save to epub, but may not be to your liking. To HTML is better, then import it into Sigil or Calibre editor.
Digitizing textbooks has been a constant request, but there just isn't support for many scientific symbols used in most readers. Nor
by design is there support for fixed layout which you mentioned. Text reflows in epubs making fixed pages difficult to impossible.
The solution for these books as it stands is large tablets that can display the PDFs at full size. But you aren't going to stick them in your coat pocket!