Good day, Mr. toofasteddie. May I ask, when you say 'need to be developed further', do you mean like letting strangers muck around and stir in other ideas which may not suit you?
If you do, IT IS YOUR LUCKY DAY!!!
I have enjoyed seeing my 'heartbeats per kilometer' metric on my runs. I've been below 800, and I think I'll aim for single-digits ;) Anyway, I wish it helped to define effort, but I'm not all that mathy, so if anything it'll be unexpectedly useful...like digit-sum checking or something...