You could even throw in a random factor so as not to call every little thing ie a clear hold has a 100% of getting a flag but a little hold only has a 60% chance.

Yeah it will be fun when a minor hold in a 1st and 10 in the first minute will be a flag. And then an identical situation on 3rd and short last minute of the super bowl with a tied game will be a no call because of RNG.