Here is a list of the general targets I have for each version. Please be aware that there might be some minor things that I've forgotten to add to this list, and that some tasks are definitely going to take a lot more time than others.
Updated at v0.4.11.6 release (08/09/26).
For the next few releases:
0.4.11.9: Youko encounters
0.4.12: Main quest content (getting weapons from the youko)
0.4.12.5: More youko encounters & other misc. additions
0.4.13: Main quest content (getting help from the youko lilin)
0.4.13.5: Youko TF content
0.4.14: Main quest content (final part of Elis main quest - dealing with Lunette)
0.4.15: Tidying up youko content, filling in any missing parts of Elis
For versions 0.5 to 0.9, there will be a very heavy focus on main quest content. Side quests will also be added, but they will be relatively small (i.e. smaller than Natalya or the doll side quest).
v0.5+
Adding in the next Elder Lilin encounter. (This will likely be the desert lilin.)
v0.6+
Adding in the third Elder Lilin encounter. (This will likely be the jungle lilin.)
v0.7+
Adding in the last Elder Lilin encounter. (This will likely be the sea lilin.)
v0.8+
Adding in Lilith's encounter.
v0.8 - v1.0
Adding in more content.
v1.0+
Continuing to support the game.