"400 applicants with only 4 winners."
Wow now they are odd, i still will apply though. When you say 4 winners was that for all branches, or 4 winners who selected pilot. If not then i suspect that out of those '4 winners' that it would be lucky if any applied for pilot.
"Of that 400 about 50-70 were sent to OASC, but I'm lead to believe that stage doesn't happen anymore."
Hopefully that isnt the case as i feel oasc would be useful, as there may be something beyond my control i.e medical that could prevent me from being a pilot, which would be a huge blow, but if it is inevitable, better to get out of the way now than later.