Right, student direct stream was supposed to be a more efficient immigration scheme. just like many other pilot programs that then became permanent. which nowadays, in reality, all have a different kinds of problems. ( look at TRPR, SUV, GTS)Agree with the post. It all comes down to the visa officer's discretion then..
Although in most cases (atleast for what I've experienced for Master's applicants) tuition + GIC is sufficient and their approval rates have been better compared to non-SDS.
But there are tools and machines that use historical data and tell you where you stand, whether statistically, SDS has a higher chance or regular. college A or Uni B. and etcetera.