"Yes, though part would be the difference in how magic was used. There were less limitations placed on it." The slavery however that was as unsavory then as it was now in Solas' opinion. Blood magic though was another matter entirely that Solas found less cut-and-dry.

Hence why his efforts had been placed against slavery. "By the time Tevinter stumbled upon Elvhenan, it was in a state of chaos and civil war." Which meant they only had to clean up and didn't learn much of what the empire was at its height though that was another story.