A three mana 2/1 with Flying and Lifelink is pretty solid
The Karnstruct tokens bridge the gap between the early and mid-game, hitting hard enough to ensure there wont be a late game stage
Amazon can have these same issues, and Ive only had 1 or 2 problems crop up on eBay in the last several years
If it werent for the mana engine, Vivi might not be as terrifying, but the fact that he provides a huge source of resources for free on his turn makes him one of, if not the best Commander in the game
I certainly have been having tons of success with blue, but the format is quite well balanced, so every color has multiple good decks you can get into
With the turn of two screws, each frame can connect with a neighboring frame, allowing you to form a grid for however many cards you want to display