The old graphs worked just fine for me - while they were somewhat barren, they had the right information density and were fine to quickly figure out what was happening in the last day/week/month (and they didn't require me to set up and maintain yet another thing).
It would help a lot if the Monitoring page let me put multiple graphs on a single page (and maybe have a high contrast option, similarly to how VMWare ESXi's web UI has it - yes, the colours are ugly, but much easier to distinguish).