An argument I heard recently against this is, if abolished, politicians won't have incentives to campaign in rural territories, and they won't be accountable to rural territories. That basically makes sense. The EC is the only thing that really gives rural territories any stake, as the majority population has shifted to larger urban centers. People who want to get away from the big cities and live a different kind of…
Whatever percentage of the population they make up, that's the stake they'll get (and the amount of accountability the politicians will have to them). What's wrong with that?
I guess when we're talking about actual campaign tours there might be some neglect that happens because of the logistics of physical travel. Although I have to question the real benefit of those visits to the citizens. They benefit the politicians themselves, but they aren't exactly a vital source of information in a world with the internet.