Learnt something new today, I did not know they divided the Rshare by 1m for display purposes.

Too much Rshares is relative to the amount need to get chests though. If you reduce the Rshares won significantly per battle, you would need to also reduce the chest requirements, if not you would need 8 wins (random guess) to get your first daily focus chest? This would make the grind even worse and discourage human players.