improved

adjective

Pronunciation: /ɪmˈpɹuːvd/

That has been made better; enhanced.
“The second is to develop a new generation of further improved contrast agent that can yield more intense myocardial contrast after intravenous injection.”
“"When we're finished in 2024, this upgrade programme will provide a much-improved railway between London Waterloo and Portsmouth," said NR's Wessex Route Director Mark Killick.”