Believe me, I feel your pain.
When DWFs came out years ago, I spent months fighting with my company to use DWFs instead of PDFs, and FINALLY won; it was not easy, and I really ticked a few people off. I have had to defend my position a few times since then, as PDFs have become so prevalent, and DWFs have taken notoriously long to actually plot vs. plotting a PDF.
The one convincing key point was the ability to be able to link to other DWFs, so that we could build a library of easy to navigate DWFs as a set of "virtual construction dwgs", using the whip viewer.
Now I am made to look like a total fool, as the whip viewer is disabled, and this ability is gone via the new "improved" Express Viewer, which pretty much negates any real benefit derived by this format vs the ubiquitous PDF.
To save a little face, I volunteered to create all the new PDFs (seriously a few thousand of them) on my own time, which was actually MUCH quicker and easier than I expected. But at this point, I am done with DWFs; I won't go back.
IMHO, with the retirement of whip combined with the new Express Viewer, the PDF has won the battle. There are simply not enough options to make a DWF what I actually need to make it viable anymore. It is basically a PDF with some very limited (and pretty useless) AutoCAD functions.
Yes, the ability to toggle layer visibility sounds nice, but the only people who use that are the ones that have AutoCAD anyway. Besides being able to HTML link the files to each other, what our clients would like is if they could pick complete layer settings similar to using LMAN in AutoCAD. They do not want to toggle through a bunch of cryptic (to them) layer names, they just want to be able to pick a complete layer state with one pick. So I have always had to plot multiple versions of the DWFs anyway, which is what I now have to do with a PDF, only it's faster. No actual benefit there. It was unwieldy, but at least I used to able to link the multiple-plot versions of the dwfs to each other for easy viewing.
As dyaimz said, "What is the (EDITED) point of a *WEB* format if it won't link to itself?!!" That pretty much sums it up for me. What a farce.
Ok, I am done with my rant. Back to work.