Update incoming! For anyone searching the forums with a similar question -- Just about 1 year later, and I am happy to report that I did get accepted to a school I like!!! Couldn't be more excited
To clear some things up - some schools do give you a chance to explain why you don't have a committee letter (weather they prefer/require it or not).
Other schools may have a portion of the secondary that lets you explain any inconsistencies in you app/grades which I used to explain why I lacked a letter.
I tried to be tactful with my explanation and I also had individual letters from good, varied sources (professors, lab mentor, volunteer supervisor).
I personally would not recommend skipping an entire year solely for the purpose of obtaining a committee letter if you have good individual letters from people you trust.
Good luck everyone!