Did you think Lando was a exploitative character? He wasn't tied to the heroes, he had his own business to handle, but he helped his friend Han because it was the right thing to do.
Finn so far seems a worse character, acting merely as Rey's foil, but we'll see where the next films take him. My main problem with him as he's written more as a Marvel character with the over-the-top reactions. The "Droid, please" one-liner was especially bad, as the OT films never inserted period catchphrases in order to appear more current.