The only fix that there could ever be to this is to remove all payouts and set one time for it. Yeess you see it. Absolute mayhem. Let the hate flow trough you. What were shardmates yesterday are now sworn enemies and are sacrificing their first borns for the top spot. The previous "shard chat leader" has been killed in the coup d'etat shortly after the unannounced update rolled out.
The whole multi-payout system was designed to promote competitiveness. And it does exactly that. The beauty of it is that this is one of the systems that is focused on early-mid game and almost completely neglects the endgame. Most of the arena-generated revenue comes from before 85, people spending thousands to make a early dream team. So the above mentioned shard chats are formed at least a few months in the shard are not really of concern to the devs. It's like that takeout container that has been sitting in the kitchen for a while now. They know it's there, it's annoying, but not annoying enough yet to take care of it.
While my arena shard is not that competitive at my payout (I hover around top 20 and during my payout I do not see any action taking place) at fleet I have 2 other players competing with me for the top spot every day. It was fun at first but now it's just dull. I am not interested in wasting 20 minutes of my life frantically checking the arena for 50 crystals. 3rd spot is all good for me, 2nd even better. I try for 1st, but if it's locked in combat I just let it be. What I am absolutely thrilled about is the fact that us 3 have all different builds (one Ackbar one Mace and my Exec)
The point is, I've been a competitive player for 10 years now (dota, wow, lol, dota 2 you name it, I've been at the top) and this system is just not meant for an individual to be at the top without serious sacrifice and luck. There is skill involved early, but the bigger GP the less of a skill factor there is. It's all about timing, and when you snipe that 1st spot. While the thrill of the seconds is great, it gets boring eventually. Especially if your wife keeps hitting you with a laddle because you are on your phone during dinner. If a guild keeps locking you out of top 10, top 20 is more than good. 200 crystals less is 2$ a day. Are you really considering that you are worth less than 60$ a month?