Yo just to chime in, none of you are going to fix the ground issue. And it's NOT the Daisy's fault. This circuit PCB is TERRIBLY designed. They are mixing a computer chip digital ground plane heavily with the analog ground. No wonder you're all getting noise. Seriously, whoever did this maybe knows about analog electronics, but no digital. You CAN'T mix a serious processor chip like this and the analog ground. Not to mention how they leave huge places open for ground loops within the PCB itself. They just decided to use the entire leftover PCB space as one giant ground, which like, yeah ok fine for your fuzz face's or whatever, but not when there's high frequency digital signals on the same ground.
If you want to make any real improvement, the best you can do is get a soldering iron get a thick wire and point to point connect it to the negative power pin that is the main ground for the pedal. Maybe you can reduce the impedance and force it to flow out of the pedal and not into the signal.
The ground plane is noised up by the digital stuff, which has more potential to go out into the audio cable grounds than it does the power ground. It's getting sucked into your other pedals, shot through them and back into the audio signal in a big loop. Which is why some have so much extra noise with out pedals. Power isolation might help there, but again, the noise is bleeding all over what should be a separated analog ground. So the pedal is going to have inherent noise anyways.
And ugh, like... the messed up ground potentials just laid out there. Literally right at exit for the digital ground is the analog signal input ground. And it's CLOSER than the actual power ground out. So no wonder there's a shit ton of noise.
Not to mention the decoupling capacitors on the TL072. Why on earth are they so far away from the chip??? And the chip ground isn't decoupled. It doesn't need to be, but considering how there's multiple other grounds that could see it as a good way to flow rather than the power ground why not?
Pedalpcb f'd up and it's giving daisy a bad name. By the real shit from Electrosmith. You wonder why they don't sell this product on their website?? Cause A, its not theirs, and B, it's a bad design.