I don't think so because he has only been getting stronger with each curse that is lifted and his power to see mana and cut through it has not lessened, I think his power to cut through mana has to do with who his dad is and who he is himself, so I think it's something he enhirited from his dad
I believe Ronan was born with a power at the transcendental level, and thus that power was sealed so intricately. Be it because it was dangerous for the cult's plan or dangerous for Ronan's still-growing body.
Fortunately or unfortunately, not everything could be sealed.
I'm worried that getting rid of Ronan's curse will get rid of his ability to defeat the Starlight's Blessing...