Originally posted by Nephthys
Right...... Except that Finn's plot through the movie has no equivalent in ANH. Nor does Rey's actually. Nor Poe's. Nor Kylo Ren's. Nor Han's. Maz has no equivalent in ANH either. So basically every major characters plotline differs significantly from ANH. Even BB-8's plot is pretty different. Theres no C3PO stand-in and instead of trying to get to Obi-Wan he's sticks with Rey mostly.
You're pointing out differences which are quite normal to have in a rehash. Do you really expect a Copy to be an Exact Copy?
Anyway Poe is playing Leia's role. Being chased by the FO, hides the plans in his droid. Sends droid off on his own with a mission to get those plans to the Resistance. Total commitment to the "Resistance" Gets captured tortured. Gets rescued by an odd "stormtrooper." But yes, very different to Leia as well, but from the beginning he was taking her place in this ANH revamp.
Rey was clearly Luke. No explanation needed.
BB8 was R2. Again no explanation needed.
Han was Old Ben. Mentor to the new younger heroes. Previous Father/Mentor figure to the Villain. Confronts him and dies.
Kylo Ren- Clearly Darth Vader from the opening scene (in fact the whole Opening sequence was a mirage of the ANH opening sequence). Ex-Jedi, betrayed his Fellow Jedi and murdered them.
Finn - He's the one big difference between ANH and TFA. Which is probably why he was the most refreshing character in the film.
Other "Minor" similarities to ANH:
First Order - The Empire.
Resistance - Rebellion.
Starkiller Base - Death Star.
^ These three things together just made the entire setting too similar to ANH that just made it difficult for them to avoid copying pretty much the same plot.