Although Zabbix is great, the documentation is a bit lacking. The documentation gets a bit messy between versions and is not too detailed, the learning curve is steep and can be difficult for first-timers, especially when they run into issues. Zabbix depends on other open-source projects, so it would be a good idea to add more information on fine-tuning a Zabbix instance especially the essential details when working with specific choices of OS, database, webserver etc. I had to do most of the things with limited resources in the fine-tuning of the database, OS, and other packages. Although not entirely a Zabbix issue it is a good idea to provide guidance on the basics. Automatic maps. It would be great if Zabbix could create automatic topology maps using discovery protocols like LLDP or CDP. Automatic Updates of host templates. It would save a lot of time if that could be done with new releases while keeping personal configurations intact. Out of box high availability setting for all sections of Zabbix
