Recommendations from YC alums that you barely know should be pretty worthless. I've been asked repeatedly by people I've met for < 30 mins to recommend them, and I've always had to politely decline. The recommendation mechanism is meant for people with whom YC founders have actually worked or studied.
My advice would be:
- explain in simple language what your product actually does. Please avoid buzzwords.
- explain why your team is awesome & what you've accomplished (together & individually)
- build stuff, release it early & talk to your users. Then explain in your application what you learned