Great output, but IMHO the data source should change to be just INFO and not MONITOR: with Redis 2.4 you can't show top-commands. With 2.6 INFO has enough data about this (see INFO commandstats).

About top-keys, no way to show this without MONITOR, but it's not the most important bit of the visualization IMHO.

So very cool but a tool like this should not try to capture the stream of the commands executed by instead rely on what the system can provide as already aggregated stats.