One popular muhsoku tensei light novel is 'That Time I Got Reincarnated as a Slime'. It has an interesting premise where the protagonist is reincarnated in a fantasy world as a slime and gradually builds his power and influence. Another is 'Re:Zero − Starting Life in Another World', which stands out for its time - loop mechanic that adds a lot of depth to the story and character development.
Muhsoku tensei light novels have had a huge impact on the industry. They've popularized the isekai (reincarnation in another world) genre. Many new light novels are now following the trend of sending characters to another world, often with some form of special ability or knowledge from their previous life. This has led to a boom in the production of such novels.
In certain fanfic concepts, Naruto could learn Edo Tensei from Kabuto. Kabuto, having mastered the jutsu, might decide to teach Naruto for some reason. It could be because he sees Naruto's potential to use it in a more positive way compared to how he misused it. Naruto, with his strong sense of justice, would then try to modify the jutsu to be less evil - like not using it to bring back people against their will.
Hard to say. It could be on hiatus, but without concrete information, it's difficult to give a definite answer. Try following the mangaka's social media or the manga's official website for the latest.