You make very good points that could be beneficial to those who bot, human players and the game itself.
limiting DEC payout
I think the above is a great idea. It allows the bots to continue to run but not take from the DEC pool. I'm not sure what the limit should be but I'm thinking somewhere on the higher end so that it doesn't discourage players with a grinders mindset.
Overall, great suggestions @davemccoy.