So, please, roadmap of the upcoming features would be useful to keep patience

You are right, time is a luxury, and we (like a lot of us on this forum) are doing this in our free time. We do not want to get into the habit of over-promising, and we also don't like the idea of over-thinking. It is our believe that good software is evolved, not designed. And while we do have a long term plan, the points between A and Z are somewhat undetermined. In fact, it is the feedback from people like yourself and everyone else that has replied to this thread that will help us pick the route between A and Z.
But, I completely understand the need for a roadmap, so that people can make decisions.
Let me put some thought into it, and put some things down on paper.... I will see what I can put up for a short-term road map.