Honestly I don't think Connie and Jean and the other Eldians are dead yet. Because, if it was them, they would've suicided to avoid being turned into full health titans and cause trouble for their teammates. So Isayama not writing it this way might be so that they can be brought back later, like...
Argh
Argggh
Arggggh
AAAAAAAAAARRGRGRGRGHRGHRGHRG
I WANT MY GUGU X RYNN SHIP NOW
I WANT TO SEE PYORAN X BEER GRAMPS NOW
OOrgrhghhhroorgrhgrr
Edit: I'm having a hard time trying to replicate my inner screams on the keyboard so sorry if you find this hard to read