One thing you guys need to understand is I do this as a hobby and having a formal roadmap, whether it be development or testing starts taking this into the territory of being work, having obligations, and not fun! I dont plan to change the development approach for now, so if you think MusicBee should be going onto bigger and better things with a large team of people then its probably best for you to move onto another project that does have those ambitions.
Also I should mention i do contract work for a living and i am about to start an assignment that will probably go on for a year and likely be quite a hard one, so its likely i wont have as much time to look at this except for weekends.
I will keep going with this project but likely at a slower pace. As a side note, i was hoping that more developers would be interested in developing plugins as a way to lessen the burden and bottleneck but it hasnt really taken off in a big way so far.
In terms of the upcoming functionality, there are a huge number of requests that i think are really good, but just wont get done.
In terms of testing, I would be really happy for someone to take the lead with testing and mapping out a testing plan. I appreciate that for that you would like an idea of whats coming next, but right at the moment i dont have a fixed idea of that.
But there is a huge amount of existing functionality that can be tested anyway.
Also keep in mind that solving bugs can be really time consuming and there gets a point where i would rather be doing things that i want to be doing and enjoy, so i will need to make a judgement about whether its worth the time and the number of people likely impacted whether something does get fixed.
So i leave this to you guys how to take this forward