What I think that could be really worth to put effort on:
1. The integration of lyrics is quite poor (JRemote and Computer). For Rock/Pop/Jazz very often wrong lyrics are displayed; lyrics for classical music (i.e. opera ...) not at all
2. The level of information about Interpreter/Conducter (JRemote) is quite poor and does not reach the level that should be possible for a state-of-the-art software (in my eyes). Example: No info on interpreter if Multi-Interpreter take place like Orchestra and Conductor. No additional info about an album, its development and formation process, its year and the included musicians, +++.
3. The given content by last.fm (JRemote) - it use to be old and very often poor and really not up-to-date. Would be nice to have a better information engine - and I really do not asked for roon like information where I often have the feeling it would be mind-driving. A really good Wikipedia integration into JRemote would may be already sufficient.
1. Until web-sites that provide lyrics ensure that the Lyrics they provide are the correct ones there will always be a risk of getting the wrong lyrics from those web-sites.
2. Products like JRemote can only provide information/data that exists in the MC Library feeding it and when it comes to Classical Music the majority of the information has to be input by hand. Although I agree its time JRemote and the other versions of MC that run on handheld supported the needs of Classical Music Fans.
Even if and when AI develops anything near the abilities of the average Human Brain integration of Wikipedia into any JRiver, or a competitors product, would be nigh on impossible.
Wikipedia only provides detailed information/metadata for some Popular Music Studio Recordings, for Compilations all the info they provide is for the recording company, if your really lucky it may also provide the Album Name and Release Date for some recordings and none for Classical Recordings. Furthermore there isn't one unified way of accessing the information.