I wonder if anyone has looked to see if Trump would have won without winner-take-all?
I think I saw some analysis that if *all* states split their electors proportional to the votes Clinton would have 262 electors, and Trump would have 258 electors, Gary Johnson would have 10 electors and Stein and McMullen would each have 1. Since no candidate would have the majority (270 required), the House of Representatives would consider the top 3 candidates from the Electoral College. Since the House is mostly Republican 247-188, even with a large number of defections, I suspect that Trump would still have won the election.
The scenario that some people are proposing to obsolete the Electoral College is that if a majority of electors were required to cast their vote for whoever got the majority of the popular vote throughout the US. This is similar but not the same as eliminating the overweight that small states have over the big states (because of the "bonus" senator electors) and marginalizes all the battleground states (as they would often simply just split +-1 electoral vote).
Without any type of winner take all complication, any strong 3rd party showing (like this latest 2016) election would likely mean no majority, so unless you want a president elected with a plurality, you probably will end up throwing the election to the House of Representatives.
However, if you read the Federalist papers, direct representation is clearly not what they intended for the office of the president. The complication of the Electoral College was taken because they wanted to make sure that candidates for president weren't just selected for their ability to be popular in a few states as they knew it would take completely different attributes/talents for a president to be successful and accepted by "a considerable a portion" of the whole country. They also wanted to minimize the ability of persons trying to corrupt the process or advancing "manchurian" candidates by distributing the power across all the states so that corrupting influence in one part of the country had a minimal effect on the process. Also, electors were to be chosen only for the task of electing a president and no other purpose and weren't allowed to be holding office in the House or Senate to minimize any institutional influence and corruption. Seems to me these are all worthy goals. Personally, I think more people should read the Federalist papers...