Oh, its yours... hmm this is awkward.
The advice is valid but your credentials don't put you in a position where you can judge what advice will make someone's portfolio stand out considering you have never been in that position to make that decision.
The advice you give is high level and doesn't detail what employers want to see in a portfolio. For example, a character animation portfolio piece would be accompanied by supplement detail on how it was constructed such as screenshots of the rig, texture layouts and model complexity (wireframe renders). Maybe even concept drawings,
One thing to avoid in portfolios are cliches. In my experience, nothing turns off a viewer then seeing another 'generic space marine' or 'space fighter'. Be as original as you can and emphasise work that you have done in your own time over coursework done in education (only if it is the same level of polish).