My impression of SE is that they are a much smaller company than people think. They never have the staff to actually make any of these games. Versus sat with a skeleton crew for years, this probably has had a skeleton crew running vertical slices for the last 2 years+. My understanding is they basically have an Osaka big staff team that's on KH3, they have DQ core team probably borrowing Square-side staff that finished with FFXV for DQXI, they have a decent size staff team on FFXIV, and then a bunch of smaller teams for side projects and a bunch of skeleton pre-production teams for FF16 and stuff.
Like until KH3/DQ11 are out, I can't imagine SE has enough staff to do FF16 and FFVIIr at the same time even with outsourcing to CC2. Feels like they can only make one or two big AAA production games at a time.