Everything
With Aleck's current mental state, he crumbled without much effort on Leonel's part. He didn't even consult the various elders of his family, he simply used his authority as Patriarch to directly force them in line.
When Leonel saw this, he didn't say anything, but he made a mental note of it. From his analysis, Aleck's prestige in the family was high enough to get away with this, but unless there was a change, there would likely be a straw that broke the camel's back later on down the line.
The common people could be forced in line like this because they didn't understand what was going on anyway, but the rich, powerful and affluent couldn't be, at least not without tangible evidence and reason for what they were doing.