Update!
I went with the BLS lowering blocks and installed them a few days ago just before a 175mi ride. They are excellent and opened up more leg room than expected. Very comfortable and no frame modifications necessary at all. The only difficulty in installation was dealing with some of the damaged parts on my bike. One of the deciding factors for purchasing the lowering blocks was so I could keep the vibrating damping factory rubber foot pegs. The shift lever only needed to move a notch but the rear brake is as lower as it can go and I would like to lower it further, which cannot be done without more work. It's acceptable for now. Naturally the rear brake light switch had to be adjusted for proper function. I also discovered that the outsides of my boots grind pretty easily while leaning but I am also very splay footed and probably would not make contact if my feet were tucked closer in. I'm not a very hard rider and don't expect to touch the pegs down any time soon but I was surprised how easily my feet touch the ground now. Overall I am very pleased and surprised how much difference this simple modification makes and wouldn't hesitate to recommend them to anyone. For reference I am about 5'10" and with somewhat short inseam of about 30" and can't ever see myself going back to the stock arrangement. The VFR now has a more comfortable foot and seat arrangement than my Zrx1200, though the helibars are still sportier than I'm used to for long distance comfort.