There could be an "All graphs" option for each host, when host is selected.
This is a small detail that can improve usability drastically.
At the moment there are dynamic screen items, whitch is pretty good if you have many hosts with exactly the same graphs. But if you hosts differ by even one graph, then it's not usable that way.
There even used to be a patch for it, that worked great with one historical version of Zabbix.
http://www.zabbix.com/forum/showthread.php?t=3064