Yes holes in your intake / turbo plumbing is a big no no. After the air cleaner, but before the turbo would cause dirt and other contaminants to be sucked into the system.
After the turbo, all the plumbing is pressurized to what ever your turbo is pushing. This could be as little as 7 psi to as much as 40 psi.
Loosing boost pressure will cause the engine to loose power and burn rich, wasting fuel and fowling the engine. Basically the engine is not getting enough air to burn the fuel delivered.
Waste gate is there to dump boost pressure over a preset amount of PSI to protect the engine components.
A simple boost gauge installed after the turbo will tell you a ton. With a boost gauge, and some technical specs for your engine, you will be able to tell if your leaking boost, and if the waste gate is working.
"Don't argue with stupid people. They will just drag you down to their level, and beat you up with experience."
Patently waiting for the apocalypses to level the playing field in this physiological game of life commonly known as Civilization