I think “no-zombie” nailed this one. Reporting will still be required but in a digital format from your phone, tablet or computer on their super-duper website. Those not tech savvy can still hand in a hard copy report. The recommendations of MS’s or elders are step #1 their service report. Are they doing the national average or a low hour brother? National average is OK, move to step #2… low hour minion pass, move on to the next candidate.
Also at its core, this religion is all about appearance and pleasing men. Imagine removing the obligation to report time. What incentive would there be to go out at all. Who’s going to prove whether you were out or not? In my area they have a combined service group at the hall for one congregation the 1st Saturday of each month, for another congregation the 4th Saturday of each month. Because many are simply “men pleasers” they only go out on that one Saturday, including many elders and their wives. You go to the one KH group, 60 to 70 people witness your presence. You then drive around 30 min, do two return visits, then coffee time for 90 min. I believe that reporting “field service” regardless of how small the amount or whether publishers lie about it, like many do, is how HQ explains that they give back to the community and do charitable works.