The idea that all decks which 1) draw cards and 2) use permission spells are strategically the same is a major taxonomic error. Decks like Jeskai Xerox, Oath, Landstill and Paradoxical decks all draw cards. But the manner in which they draw cards is wildly diverse, and their strategic objectives are equally varied, with very different strengths and vulnerabilities. Sweeping them all into a super umbrella category "blue" reveals a fundamental misunderstanding of the format and the game.
The better way to understand a decks strategy is the approach I use in my Gush book: which is to break a deck's components into: 1) ultimate strategic objectives, 2) intermediate strategic objectives, 3) tactics, and 4) mana resources.
From this perspective, every deck seeks to achieve it's ultimate strategic objectives, which are the cards that satisfy the conditions under the rules that win the game. To achieve those ultimate strategic objectives, most decks pursue intermediate strategic objectives. An example of an intermediate strategic objective would be to resolve and trigger Oath of Druids, and the ultimate strategic objective of the Oath pilot might be to get Griselbrand into play and attack with it 3 times.
Tactics are cards that are either used to a) defend one's own strategic objective or b) disrupt an opponent's achievement of their own. Force of Will does both effectively. Pact of Negation generally only does the former effectively.
Anyway, this is laid out in much more detail in my Gush book. But sweeping all decks with wildly different strategic objectives into a super category of 'blue' is a tremendous mistake. Not simply because those strategic objectives are superficially different. But because they all have different strengths and weaknesses in the metagame. For example, Paradoxical Outcome strategies are weak to Null Rod but Standstill strategies are not. Same with Oath relative Landstill vis-a-vis Cage. Lumping them together masks these critical differences.
Blue is a color; not a strategy. Just because a deck is blue confuses one thing for another. Blue decks use non-blue cards in strategically important ways (Dark Confidant, Oath of Druids, etc.). Moreover, the color pie is radically inconsistent over decades, and there is nothing essential to blue that does not exist in other colors, and vice versa. So, blue is a superficial characteristic at best, with no deep value or quality.