There are several reasons I don't use meta report
1. Rotation exists. In some payout timezone, there are multiple people who share payouts, and if they have a chat room (discord or line or anything), they tend to coordinate it and make a rotation. (Ex) today I take first and you take 2, tomorrow you take 1 and I take 2, and the day after tomorrow, I take 1 again and so on
Therefore daily meta report is influenced by who's turn it is to take nr 1 today.
2. Drop immediately after payout.
Swgoh.gg takes time to investigate my rank so the rank registered on .gg reveals not the rank at my payout but the rank after the delay (usually 7 min for me, so my rank at 18:07). If that happens(the person with 1 hr later po attacks me in 7 min), even though I ranked 1st at my payout that day, I'm not registered as rank 1. Supposedly me and the person whose payout is 1 hr later should be equally registered as rank 1, but only the person after me is registered.
3. Makeshift lineups (i.e. rex)
If enemy is unbeatable or almost unbeatable with my major lineup, I compose a makeshift rex lineup and that some days that lineup will be registered instead of major lineup
4. Joke lineup
Some people might feel like they should mess up and set a random team in arena right before the swgoh.gg register time, leading a coruscant underworld police to be spotted on the rank 1 leader character list
5. The meta is unobtainable anyway.
Yes traya sion, all good, but unobtainable for me practically. I have to use what I have. So meta report doesn't help, especially these days