Unabogie
Philosopher
With only two weeks to gain name recognition and speel out your "why I'm better than my opponent" in a primary and only a month - with limited funds - to run a national election. Especially without a national party to do your preliminary campaigning and provide the echo chamber which so many modern candidates depend upon. You aren't going to have large national private political organizations and groups or industrial special interests to parrot messages and magnify their impact. As the monies are going to be greatly restricted compared to the current system the time frame forces a concentration of the message. I don't see that longer time frames would be sustainable, yet alone desirable,...once the funding is severely curtailed.
As a side benefit, concentrating elections actually might allow people who normally suffer campaign fatigue in a seemingly near endless cycle of elections, to pay more attention to real issues and candidates without all the bluster/blow and mud of year-round consistently on-going elections.
You've forgotten a certain news network that only exists to elect Republicans, that would spend all year airing "stories" that serve as campaign commercials.