Another vine would be clematis, though it might take a year or three to provide good coverage. If you bought a large one (silver star vinery is a good source of big healthy clematis without a huge price) it would fill in faster. You could grow it up a trellis on the porch or a free-standing obelisk/tuteur. Annual vines, such as scarlet runner beans or black-eyed susan vines running up a net, wire mesh, or strings might provide good seasonal coverage until whatever you decide for your permanent solution gets big enough. Even the trellis itself can provide some screening. If you are looking for privacy when deciduous plants have lost their leaves there are some narrow evergreens (not flowering, I know) that you might want to consider as an addition. Do a search for columnar evergreens. Look into some of the hardy hydrangeas. I've seen some of the varieties of H. paniculata, which will be fully hardy for you, pruned into tree forms. If you use the search function in this forum, there are a couple of old threads on hydrangeas which have several images of various H. paniculata varieties. Some of the varieties include Limelight, Pinky Winky, Tardiva, Kyushu, and The Swan. Be sure to check width, since they are not all the same size. Here is a link that might be useful: Silver Star Vinery

I couldn't get into the pictures, but a few thoughts. If the French doors will take up all the open space in that 11 foot section that should be fine, but otherwise you'll want to enclose any other areas. Since you don't have much width, I would use a door that slides sideways (they have doors that look like French doors but are really sliders), otherwise you won't have much room to open it. With the step down to the porch, you will be much better off building a few steps down rather than trying to raise the floor--you could end up rebuilding the whole floor system depending on the condition of it.

I hate painted decks. Period paragraph. How did the paint "ruin" the wood? I can't find a Behr product called "Renew". Synta/Rustoleum makes "Restore", Behr makes "DeckOver" - was it one of those 2 products? Can you walk from one area to the other directly, ie the paint will have a line where it changes color? That would be jarring, but if you're not worrying about selling before having to do it over, if it doesn't bother you, go for it. If you're rebuilding anyway, why not roof that section over as well? Thus making the entire porch uniform and consistent and solving your long-term problems with repeated sun damage. It also now becomes a porch instead of a deck so painting the wood isn't quite the problem it is for a deck. Otherwise - this is new construction - I always and only use transparent water repellant for exposed deckwork. You should apply that first even if you want to paint anyway - I just stop right there, then there is never peeling ugly paint that has to be scraped off, scraped up, wire-brushed, and sanded away before you can do anything else with the deck.

So how weird will this be? We have a wrap around porch. The front and side are covered and we have it painted. It has been 10 years and needs to be redone. The roof makes it hold up pretty well. The back part of our porch gets full sun and is not covered. We have had to redo that part many times. We used some of that Behr renew paint on just the back portion 2 years ago and it ruined all of that wood. So my husband is going to replace all the back partl. It is all pressure treated wood. . So... we want to definitly stain the back. But removing all the paint (on the section that is painted) on a pressure treated deck is very difficult. I tried stripping it and it will take me forever. I'm not so keen on sanding as it is pressure treated. So would it look ok if I painted the front and side with a bluish grey porch floor paint and then when it gets to the back section transition it to a brown stain? I like the two colors next to each other but I am nervous that it would look awkward. I don't like the idea of a colored stain as I think it will show all the chipping much quicker. I was thinking of using penofin for pressure treated wood as it penetrates wood well and therefore does not show as much when it starts to fade. Thoughts?