Well..True.It's tough business to be an indie developer for a niche genre. I believe there is potential in this market for people who are prepared to harvest. The games I listed are some examples and Sheable_soft is the forerunner right now.
I fired up the latest release of Roshutsu yesterday and it feels dated. The world has moved on, with or without Jaguar. The games I listed each have its innovation, strength and weakness. If Jaguar means business, he should be studying these games and see what he could do better. But that doesn't seem to be what he is doing.
P.S. I always have this feeling the team behind Roxanne wants to finish off what Roshutsu has started, then saw the success of Seleka and made some significant change. I think this is a sound strategy (adapt to the market, because market does not adapt to you) but as a result, Roxanne also inherit some antique mechanics from Roshutsu.
You can't expect miracles. The changelog already showed that this is just a minor update to the original (last) fully playable build, no remake is happening at the moment.
I feel the same way about original Roxanne. There's a certain similarity and inspiration there. However, from the beginning, Roxanne seemed a bit more lively, especially the more action-packed NPCs, while Roshutsu is a very traditional game model and avoid walking dead NPCs. But as you say. Seleka set a new golden standard.