He doesn't copy whether that creature is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, and so on
Im thinking about this more like a 6-mana play, but running it out exposed on turn 4 so you can D-Tutor on turn 5 seems fine, too
Among this years crop, theres even some evidence backing up one of this weeks bans
Red has some excellent uncommons, including Sunset Strikemaster as a mana dork, and Overwhelming Surge as flexible two-for-one removal
Personally, I run a Ball Lightning and a Groundbreaker in my General Marhault Elsdragon deck, where Ill use Invasion Plans-type effects to turn them into heat-seeking missiles