It would be nice to have a small screen that displays when you hover a benched character over a character in your formation that says if Click Damage will increase or deplete and how much.
When you get a ton of DPS, you should get an achievement called "Now You're Playing With Power", a reference to the NES commercial. Then, when you get even more DPS, an achievement called "Now You're Playing With Super Power" for the SNES commercial
Towards the end of the game, Red Trees are significantly more rewarding due to the shorter wait time between harvests, and more Garden EXP in general (which converts to more Blue Coins, White Coins, and various other stuff). But you're free to pick the kind of tree that you like! :P
Those used to exist, however, many players found such rewards unappealing so I have changed them to Mystery Boxes (such as Explosion Crates, Awesome Crates, etc.). When you open Mystery Boxes, you have a chance to obtain things like you mentioned, but there are also BETTER prizes that you can get! And don't forget that the more consecutive days you play, the better the rewards - the first few days will give you mostly Green Coins, but later on you can get really awesome things! Either way, thank you for your suggestion, and hope you enjoy playing Anti-Idle!
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Thanks for the feedback. =)