It does seem like a decade that could benefit from a do-over.
Most of the good things that I've thought of have been artistic or science-related.
Tessa Virtue and Scott Moir did some fantastic figure skating
https://www.youtube.com/watch?v=wOEKdWrtz6U
LIGO detected gravity waves
https://www.youtube.com/watch?v=TWqhUANNFXw
A person can get their whole genome sequenced for a few thousand dollars.
https://www.illumina.com/techniques/sequencing/dna-sequencing/whole-genome-sequencing.html