Mining is supposed to be a level up deal, the higher your level, the faster you'll mine. They actually fixed some of the mining so you will mine less rocks than you had to before for each level.
Recycling is fine the way it is. Though I love digging, recycling is a second choice. Not only do you collect trash but you can also pick mushrooms. Trash is decently priced and has a good spawn rate imo.
Flower picking is just useless imo and I wish they could change it to make the job more worthwhile - it's too slow and you need a certain amount just to get 1 gralat.
Pizza making is alright, it doesn't pay well I'll admit, but I'm not sure how they can fix the job. You don't expect a pizza to be worth over $30 so maybe they relate it to rl? Just like flowers.