Strengths:
The key Royalist strength revolved around Charles's position as a divine monarch. Many royalists felt an inherent loyalty to the king, which was an age-old, traditional, long-term support, compared to the recent Parliamentarian support.
Weaknesses:
The key Royalist weaknesses were due to Charles' ineffective man-management and the ability to make decisions. Whilst indeed the command structure was unchallengeable and clear cut, Charles still wavered, too cautious to commit an obvious error.