The two sides are going to fight this out between now and the election to see which can pocket the most votes. Tax relief will really probably have to wait until next year. For decades, Congress has tried to figure out how to tax people with different marital statuses fairly. It's a very complicated tax system, made all the more difficult when efforts to fine-tune it fall victim to politics. And believe me, single people don't want a tax increase.
Estate taxes are a funny issue.
It's a hot political issue, but I suspect it will die down when more people understand how few people are really affected by this tax. It's not a minor annoyance to the politicians. You're right that married people get all sorts of breaks, but they also lose certain breaks. One thing about Americans is we rarely look at the benefits we're given. Instead we look at what we lose.