block size should be increased based on specific measurement
Not your call. Block size will only be altered if/when those securing the chain collectively agree to bear that cost. No formula or measurement will make that decision for them. The impetus will come from them and not the other way around.
I never state i make any call either. And i never say about implementing formula which determine maximum block size either.
It sounded as though you were suggesting that someone would calculate some costs, determine a block size based on those costs and that those securing the chain would just kinda go along with it. But whatever you did or didn't say, I'm making it abundantly clear that it doesn't work like that.