block size should be increased based on specific measurement (e.g. cost of hardware and cost of running) , rather than choosing arbitrary number (just like what BSV did).
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.
The scaling debate proved pretty conclusively that people talking about what it "
should" be are just making noise. The only thing that matters is what non-mining nodes will offer to relay and what miners support. And that will be determined by the code people are choosing to run.
If code doesn't exist to support your view or you aren't actively running that code, you're achieving nothing. Everything else is just a somewhat worthless opinion.