The major problems that make it weaker (now beware I'm not a software engineer I'm mainly paraphrasing a developer who was having trouble with Nintendo I don't know exactly where the interview is I can try looking for it) are that it runs on older tech that are not as well equipped to handle the dynamic nature of online play. Also their is more than just servers required to make a connection an Nintendo apparently hasn't invested into these connections. Like I said I'm not a real heavy computer guy so my explanation is a bit vague. Others (such as developers) can better explain with more technical terms.