Pretty much, unless you're looking to full clear every mission/collect a few extra FGs.

Actually, now that we have 5 or 6 missions and several world zones, it's over half an 11 pull to complete them all as a reward ATM.
Granted you actually need the units from every zone to be able to clear the missions, so not totally accessible to new players as a source of FGs but for some veteran players with extra stamina to spare there's enough content there to be worth doing.

You mean you guys aren't playing it for the cutscenes of otherwise often neglected waifus that don't get any screentime?

Come now. Where else can you see things like Mei and Sakura being afraid of Convallaria, Mint being surrounded by Mega Milks, or people reacting to the Hammer Segway Transportation Weapon Device?

->Open Spoiler<-

There's also Daisy killing the queen, the loli strategist meeting, and German Iris being German Iris.

I don't tend to read the mission scenes before actual missions.

I tend to go to the stories section and read the entire chapters once I'm done them. Easier to keep track of things that way.