My main gripe is with "static" dashboards, i.e. dashboards that don't let you drill down (e.g. to investigate an interesting spike), and has disconnected widget

My main gripe is with "static" dashboards, i.e. dashboards that don't let you drill down (e.g. to investigate an interesting spike), and has disconnected widgets (i.e. applying a filter to one widget doesn't affect the other widgets).