What monsters do others want to see updated for 5e? I crave more undead for my world, so I updated the blazing bones and chillborn zombies. Take a look in the link below and let me know what you think of it. Also attached!
https://worldbuilderblog.me/2017/03/02/elemental-undead/
https://worldbuilderblog.me/2017/03/02/elemental-undead/