The size isn't the problem, the layout is. Small maps with good layouts are great gun. Scrapyard comes to mind.
Its interesting how everyone loves Nuketown because its "small and fast paced" yet two thirds of every team just camps their home building for the whole match
Very well put. As far as small maps go for COD, I like dome (W@W) the most. Nuketown for the most part is just two 2x3 sightlines that are almost identical to each other. Rust and shipment for example, are way too small for the layout to be as important.