Alex's Sword Intent had been one of his greatest strengths for a while. Aside from his Qi, which could leap realms to catch up to others at a higher cultivation base, his Sword Intent had been the only thing he had that had been stronger.
Then he had received the Blood God's Manual, and that had brought along another strength that dwarfed both his Qi and Sword Intent.
After that, with how busy he was being a king and trying to come up with pill recipes and learn Daos, he hadn't had the chance to improve it much.
When he first came to the Eastern Continent, his Sword Intent had been somewhere around Saint Core 4th realm. Nearly a decade and a half had passed since then and he hadn't improved at all.
Not that he didn't want to; he simply hadn't had the time to improve his Sword Intent. He couldn't do it without having a somewhat serious fight to improve it at least.