1) while you really don't need to, it does make a very noticeable difference end game if you wait until the Magitech facility.

2) Ignore Ava, she's just an old schooler. The new Script in the GBA version is more polished then the original, only having a couple things that aren't as good. (Son of a Submariner and the final villian speach). Overall it's superior.

3) Blitz will own your soul.