While your idea might be useful for some, I for myself would not want my nodes to be connected to some 3rd party website for monitoring.
That’s probably a reason why those self hosted solutions exist. Maybe first ask if there is enough interest in such a solution before investing effort into it.
I can recall we had something similar in the past (again, I am not using it). I think it was this: New dashboard project for SNO
Maybe the greatest appreciation would come for working on the existing Multinode Dashboard and make it finally useful.