Why I think the grind for 5K 6 star shards arena is fair.
Please read my argument before agreeing/disagreeing.
The new 6 star arena gives about a total of 5k 6 star shards and requires a very long grind(about 700ish fights). It also awards a lot of units and chips and collector crystals. Let put this in to a comparative perspective. Remember act 5? It gives the same amount of 6 star shards as the completion and exploration of act 5. Can you explore act 5 100 percent in just a week? It would be really hard. It has more 6 star shards than the completion of 6.1 and 6.2. It has more shards than the full exploration of the cavalier eq. The fights are pretty easy too. Even UC's can get those 5k six star shards!. My conclusion is that you DONT need to get those 6 star shards if you dont want to grind. If you dont want to grind the arena then dont.