You have it so wrong.
First of all, FF7 is not a poor game. There are many who claim it is the best FF, and there are some who claim it is the best RPG.
And secondly, FF7 is designed in a japanese cartoon kind of way, you know, anime. The main thing about anime is that it overexadurates certain features to emphasise them more. Like bigger heads so you could see emotions better, or crazy hairdo's. This is in NO way a flaw, it is simply a style. It is neither good nor bad. You can like it or not.
And lastly, the sword was made big to show Cloud's strength. I mean, if you're strong enough to even pick up that thing, let alone use it, you have got to be really powerful.
Tovi 
