Yes the most important changes are:
DIP0001 implementation (which is a 2MB block upgrade);[/li][/list]
Transaction fee reduction 10x (activates via DIP0001 activation);
InstantSend vulnerability fix (activates via DIP0001 lock in);
PrivateSend improvement which should allow user to have mixed funds available much faster;
Various RPC changes;
Lots of backports from Bitcoin Core and refactoring of our own legacy code which should improve performance and make code more reliable and easier to review;
Experimental HD wallet with BIP39/BIP44 support.[/li][/list]
You can read more about it at the below
https://cointelegraph.com/news/all-eyes-on-dash-as-currency-surges-60-despite-crypto-market-turmoil