SarangHaeYo: If you played the game at all before December 7th, your Elizabeth and Leon most likely will be buggy. If you try to talk to Elizabeth now, despite not needing to talk to her, you can't at all. When you say you "started", did you already have this quest a month ago?
Also, it's not really you being strong enough for the other exits... you simply have to get into town from them before you're allowed to exit from them. That is, if you can get to them safely.
To get through the west gate, you have to exit west out of Village Greens, then north out of Bill's Ranch, then east out of Zen Gardens; you should now be back in Barton Town and be able to go through that gate whenever you want.
To get through the north gate, you have to exit north out of Zen Gardens, then walk to the southeast portion of Bassken lake to get back into Barton Town... at this point, both gates will be open.
Do be warned that walking through Bassken Lake at 2.4 is risky; you will die very fast.
Blade: He can't talk to Leon to finish that quest in the first place; that is the first quest Leon gives you (I believe) after finishing Elizabeth's quest.
Nespin: Minor suggestion, but make the "targeting yourself with spacebar" it's own line?