We at Quantum1Net believes what needed is higher amount of data transaction and speed, lower power consumption and stronger security.
https://github.com/quantum1net/DocumentsOther than that, what do you think?
For mass adoption, public awareness is must. Most of people either don't know about cryptocurrency or do not understand it or either afraid of entering it. Unless Knowledge is imparted and hesitation of not using is removed, crypto currency can't be mass adopted.