Repeat the french doors.

Do the French doors in the kitchen go out to the screened in porch? Will you build a deck adjoining the screened porch outside the new doors? If so, will you create access to the screened porch from the new deck? I'm not sure why you want all the doors going outside. I agree with Chap De Laine that you should match the current French doors. However, is there room for the doors to swing open like in the kitchen? If not, sliders with a matching style would be better.

The same french doors you already have for a nice continuity is this open space.

You can get French that open right up. Seamless frames.

Already did the project. Went with paneless glass panel doors, 1 on the far left of opens onto the new 4 foot deep decking, 2 are fixed but are doors. The second, and only other operable, door is paneless and replaces the right sided door onto screened porch. Eventually may put screen door from deck onto screened porch, but for now a door to the far left gives access to deck and steps into back yard. Decision not to use french-style paned glass doors/windows was economic. Also, aesthetically I had previously installed 3 large, paneless casement windows on a windowless east facing wall in dining room, and casements in same east faceing wall over the kitchen sink where a (I find them ugly) 70s greenhouse type window was. So I already had a sleeker mid-century theme mixing with 9 over 9 traditional, mullioned, double hung windows on rest of the home. I think the mix works and so does my big sister (who has strong opinions and tends to be a purist so far as honoring the period of the home).
If budget was no problem a series of mullioned windows/doors would have been nice, but now I have a great, less obstructed view of my garden, which I love. Sliders would have possibly worked, but they cost more and I did not weant that Florida room/porch vibe sliders imbue.
thanks for your input.
Can post after pictures if anyone is interested
Thanks, Sarah.