Much thanks for all the input.
I had already booked LH451 (LAX-CDG, seat 3A) for this trip, and I think I'll keep it this way in order to compare to the AF 777-300ER for which I'm booked in seat 1L on two trips each later this year.
Too bad about the wifi issue, but that's not a deal-killer nor does having wifi on LH offset the degree to which I'll probably prefer the AF ground service and catering.
After my several upcoming trips this year, I suspect I'll prefer AF over LH (when it comes to P), but I get it that LH is a very acceptable experience (except, perhaps, arrival services). Can't wait to report back.
Good point about MUC, which I'll keep in mind as it has nonstop flights to my frequent destination (LYS). And I've had my eye on LX 40/41 (77W) just to use up some remaining LH points this year.
And FWIW, I'm switching from AA to FB this year and doing the big push to Platinum.