Drawing in the story mode pauses the action(except in mission mode) and the shapes you draw turn the color of the unite morph it will summon before you press the button confirming the transformation, therefore the gripes about messing up "in the heat of the action" don't hold as much weight as people would assume for a game like this.
That is clearly another example of a lack of understanding from reviewers and what makes some of these reviews worse is that the demo has been in people's hands worldwide for over a week now. People got to try the systems for themselves, battle with the learning curve, and the consensus is that the controls are fine. I hoped that the positive reception would have trickled down to these reviewers, perhaps causing them to take another look at maybe where they might have misunderstood the controls (like many had on first impression with the demo) yet egos are a bitch. Once a reviewer has determined that something is wrong with a game and not with the way they play it, good luck at trying to get them to see the error of their ways.
A little off topic, but I wish there was a meta-metacritic site that allowed you to review reviewers of movies/games/etc. Sometimes these people need to have their work evaluated because anyone can judge media on any abitrary system and rate it what ever they like, yet metacritic averages the score like everyone is using the same system or even the same scale. It's a joke.