Yes, level-wise is definitely enough. You may just need to fine-tune some defensive extra-position players with SA suitable for your team later on in the next few seasons when you need to retire a few 22/25 yo players.
And maybe keep an eye to spot and train up your next superstar to continue the legacy of Suazo.
What is the unstorable greens that you have mentioned though?
Winning is a form of art. Consistently winning is a show-hand of skills and luck.