Despite his looks and amazing rap, it shows how the right group can make an idol reach their potential as a performer. People don't watch Big Bang performancers expecting to see an super difficult choreo, that's not their thing. They watch Big Bang for fun and rap-heavy performances. If TOP was in a dance heavy group, he would be bashed and his real abilities as a performer wouldn't be exploited.
This. Being able to work within your strengths and minimize your weaknesses is so important. Companies really try to find the right combination of talent and good fit for these members and that's a big reason why some popular and talented trainees get passed over for debut. And even if the group concept is necessarily perfect for them, the right combo of other members might be enough to compensate