That's why I've limited mine to being even with NFL.com's because since I'm a nobody, at least people can cross-reference the overall totals against the league's if there's any doubt. Again, the biggest change I made was being able to break them down by span of games, down, quarter, etc. I did that because I got tired of not being able to find those and just figured it would be easier to start tracking them. So that's sort of how it started. CBS Sports is the only site that has those (down, quarter), which is where I compare those against to make sure mine are right.
It's changed a bit and I added the ability to also break them down by QB in 2016 because I wanted to break down completions/attempts by each QB to each receiver while Brady was out. That also came in handy during preseason, since obviously various QBs appear in a game and at least that way, you could sort of see who they were targeting, etc. The directional totals are obviously also tracked by the league, but they don't separate out the zones, etc. by player. They just show overall totals. So I added that, along with the rushing/receiving chart by distance, etc. along with red zone receiving.
But all of that is just manipulated off the plays and how the league does it. I'm going to add player pages at some point along with some other week-by-week breakdowns. Just haven't gotten around to it. Not enough hours in the day