It was no secret that the LG G2 was being released. It was no secret it would be priced competitively with current flagships (think GS4, One, Moto X, iPhone, etc.). If you still bought a Maxx knowing that then you did so because you felt it better suited your needs. Just because the G2 is launching doesn't mean your Maxx is suddenly useless. Be happy with what you have or trade it/sell it and get something else. It's not that difficult.
After all, despite its impressive spec sheet, the G2 still does not do some of the things your Maxx does. Think about that when you're considering value. I would gladly pay the same $199 price tag for the Moto X over the G2, and the Maxx does everything the X does and more.