Seems like a goldmine of content for them to work on for the next decade+. Plenty of people will never experience these worlds or stories due to the turn-based combat, so giving them the Remake treatment could be the only way an audience ever finds them.
I would like to see FF8 remade next. It’s the next logical choice becauase 8 comes after 7 and it’s a solid world to leave the FF7 rut for.
The rest could be good, too, but FF8 would probably be the easiest to pull off successfully.
Like you said yourself, it’s risky.
That said, I think SQEX is one of the better large publishers out there about giving ideas some leeway. Hell, they let Yoko Taro make really fucking weird shit for far longer than was reasonable until it finally paid off with NieR: Automata.