Hambin is largely abandoned and is mainly used by those running the Zwave binding to gain access to more detailed information and configuration settings for Zwave devices. And Habmin was an all-in-one UI built mostly for administrators but also with some home automation user facing stuff. As such, Habmin is more like PaperUI than it is like HABPanel. Habmin will not be available on OH 3.
HABPanel is a home automation user facing UI only. This is where you, as the developer of your home automation, create the interface that you and your family and guests to the home use to operate the home. HABPanel will continue to be available and supported on OH 3.
If you are not happy with the charts available in HABPanel, see InfluxDB+Grafana persistence and graphing.