Very well written piece. It is very expensive, but as seems to be the trend on here, I would agree you are paying for the quality with LEGO. I like that they have provided the opportunity for adults to build sets with the LEGO Modular buildings range, those sets use real architectural techniques in their construction and are really quite impressive.
An exclusive version of Titan Class Metroplex was made available at San Diego Comic-Con 2013. He comes with 12 small, non-transforming figurines of Orion Pax, Megatron, Bumblebee, Thundercracker, Trailcutter, and Hoist, all in both modes. The figurines are based on their Thrilling 30 Generations Deluxe Class toys, and similarly to Decoys, the Autobot figurines are cast in red plastic, and the Decepticons in purple.
The TakaraTomy "Autobot Alliance" release of this toy has some significant differences, including casting the red plastic in a darker shade, making his shin and wheel joints grey rather than Hasbro's bronze, painting the Matrix of Leadership silver, and swapping out the dual energon swords for battle hooks, similar to 2010's Leader class Optimus Prime. However, due to the Japanese release retaining the Hasbro packaging, the box still advertises the dual energon swords rather than the hooks. He retains the masked face used for the Hasbro release.