If Comcast succeeds getting its acquisition of Time Warner approved by regulators, it will be the final step of its plan to extract as much revenue from customers while investing as little as possible. And even if the plan is (most likely temporarily) rejected, there’s no reason to expect them to continue doing so.
But it’s not like competition in broadband exists, anyway. Most communities have only one ISP (I don’t consider DSL to be a contender) unless they’re one of the few places where Google has blessed them with their fiber offering. If Google decides to roll it out in a big way, versus the one city at a time approach they’ve taken so far, things might change. Until then, Comcast, whether it gets to buy TWC or not, will do just fine screwing over its customers with no one to interfere.