"would be nices"
1) It would be nice if jwplayer could be configured to automatically stop on the last frame instead of proceeding to blackness. Instead, programming effort is required to implement onTime events and to stop the video 1 second short of the end. This workaround of course also requires that videos have at least 1 second of dead time at the end, which is weak.
2) It would b nice if jwplayer could be configured to change its aspect ratio BY PLAYLIST ITEM rather than forcing the same aspect ratio on all items of the playlist. To get around this, programming effort is required to manually stop the playlist, kill the player, and then restart the playlist with the new item and the new aspect ratio.
3) It would be nice if jwplayer could be configured with a helpful countdown timer between playlist items, i.e. before automatically playing the next item (as with youtube and others). This would also solve the issue of the "next" message occluding the current video, since there would in this case be no need for a "next" occlusion. This obviously also can be overcome with programming effort.
4) It would be nice if jwplayer's API documention mentioned that the "playlistItem" event is fired twice when starting a playlist item. Programming effort is required to work around this, including the debugging effort necessary to understand that this is what is happening. Furthermore, the first event always shows the playlist item index = 0, even if it is not. The second event has it correct. So there's probably a bug here as well as a documentation issue, or maybe just a bug period.
Bottom line: great player (7.8.7) and overall quite happy so far, but unhappy that programming effort was required to make it work well.