We all know the game is not very welcoming for new players and I don't think it will ever be, it's only the old community that sticks around because they are the only ones that can deal with the heavy grind/lvling system I have tried countless times to get friends over and they quit straight away, and they are used to byond games like goa or nff which are similar, even though Nin Online appears to be a superior Byond Naruto Fan game it unfortunately fails to cater new players and I guess in a way that's fine, it's not meant to be a huge populated game but it could be
It's a great game nevertheless, but the grindiness/lack of events/missions/content is what makes people not stick around, but if you love PvP/Roleplay it's a great game, plus the artwork/sound of the villages is spot on and you can tell the developers love the game.
It could also benefit from instanced dungeons similar to the spider boss, that's really fun to do but only for low lvls, really surprised not a lot more like that were made