There would still be two parties. They would just both shift left until they were roughly equal again. We currently have a right party and a far-right party. One of the reasons Democrats are so ineffective is because they are trying to appeal to an incredibly wide swath of voters. They talk as if they are centrists, but their actions are conservative, and people on the left are left without representation. Eliminating the EC would shift Reps to the left to appeal to more voters, which would push Dems to the left to distinguish themselves, and the middle ground would actually be in the center again. That sounds like a big win to me.