A $14 savings per customer per month times about 20 million customers is $280 million per month or 3.36 billion dollar savings per year. That doesn't sound like chicken feed to me.
They got zero Time Warner content from buying Directv for $50 BILLION. They got that content from buying Time Warner at an even higher price.
One of their stated goals from buying Directv was to get better contracts with networks, but the savings they claimed ($14/month per customer) are chickenfeed in comparison to the price. They need years of Directv's profit to justify it.
They could have created a streaming TV product and gave it away for free for years to build a customer base if that was their end goal, and spent a lot less than $50 billion.