I just want to say thank you to the OP for this. I was able to book an awesome trip and use up a bunch of future flight credit from cancelled reservations for myself and my wife.

CDG-FRA-LAS in October (using this to return from Europe after visiting London to see the NFL matchup, hopefully)
LAS-SFO-AKL in December
AKL-SFO in December
LAS-ZRH-CDG next April

These are not my dates, but this is a very similar itinerary to what I booked - Google Flights

Cost was $3,062.72 per person.

I'm incredibly excited about this itinerary. I have a question for the hive mind here - reading the fare rules it seems like changes should respect the initial pricing after I fly the first segment. Given that is the case, should I be able to change my last LAS-ZRH-CDG to May once I fly the initial CDG-FRA-LAS legs? I would prefer to return to Europe about a month later than I'm currently booked but the booking schedule wasn't open.