1) Double/Triple/... -posting is against the rules of most forums, and can only be tolerated in very specific circumstances. In your case, instead of a quick succession of posts, edit the original post.
2) The team does not get paid for this magnificent mod. They all do this in their free time. That's why patching speed may seem slow. "Soon" usually means, sometime in the coming 6 months. They also don't set dates at which you should expect a patch, to make sure they can work on it as they please, without having time pressure. There had been a stream where a few players had playtested the mod. That means it is very close to release. However, there are still some rough edges, like minor bugs etc. It won't take 6 months to fix those though.
3) So, your proposals:
- Spahis and light cavalry have totally different roles. And the Spahi is so strong that it probably has to remain a HC only unit. If Spahis would become trainable, then I prefer that they are taken out of the Ottoman civ, and are used for another civ, because I think some of the North African nations also had Spahis running around.
- It's not the first time I see this proposal. Apparently there were some still Samurai at the start of the long nineteenth century? Else the team would've not included them.