Just playing with numbers a bit:
Off the top of my head, the next episode's content development can be divided into 6 possibly roughly equal parts:
- main story and canon events
- Maya and Josy path
- Bella path
- Sage path
- Jill path
- others path
If we're 5 months in (some development started before releasing episode 11) and reaching completion on one MG path (or nearly there), if we assume development started with the main story and canon events to provide a shared framework, that would suggest a 15 month total dev time (ignoring time spent waiting for renders to complete once writing is done).
So, with some shaky assumptions and very handwavy maths, it looks like things vaguely on track for the second half of next year...