Whether to do EE or avoid EE parks is a very individual decision. Factors to consider:
1. Sleep patterns: If you're early risers anyway, you can take advantage of the extra time in the parks. If you're not a morning person, don't make yourself miserable! Go to a non-EE park.
2. Weather: Will it be hot? How well do you manage in the heat? If the heat bothers you, it would be worth getting that extra hour in early, then leaving the parks when the heat gets too bad.
3. Crowd level: How crowded are the parks when you are there? If the crowds are low, you may not get much benefit from EE. If the crowds are bad, and especially if you're someone who is bothered by crowds, getting there before the big rush can help.
4. Park hours: When the park hours are reduced, that extra hour can really come in handy.
I'm sure there are more, those are just some that we consider when deciding whether to do EE or not.