Is Brady a running QB who can win with his legs? As BB himself said only weeks ago, it is virtually impossible, without a playbook, to tell what was designed on failed plays. If a receiver is executing a timing route, and the receiver doesn't get there on time, or gets there too early, then the throw looks off and the QB looks bad. That does not necessarily mean the QB did not execute precisely as designed. Last year, with veteran receivers, Brady was on the money. He did not simply lose all that in an offseason.
Anyone with any knowledge of the game would label the execution of the plays off. Drops are receiver mistakes, but can be QB mistakes if the ball is thrown too hard or soft for a given route or is off the mark and makes the catch more difficult than it should be. The rest could be Brady, or could be the receivers, or both. If Brady is holding the ball because the receivers cannot get open, then that is likely on the receivers. If he misses open men, then that is Brady. Given the fact he performed fairly well in Atlanta, I will not drop all this on him, or speculate as to whether the team could have put 30 or more points up in all games if he played well. I seriously doubt any QB in the NFL would play well under these circumstances as this is a learning curve with costly lessons for new receivers. The hope is the pieces come together and synchronize, as there have been flashes of good so far this year.