Nothing has changed for 6.0 in terms of formatting the email. As before, if you don't like the email, you can either (1) edit sendemail.py or (2) create a scripted alert and do it however you prefer in your script.
Here are my favorite answers from many previous questions on this topic.
http://answers.splunk.com/answers/34570/how-to-add-custom-email-alert-content
http://answers.splunk.com/answers/2641/how-do-i-customize-scheduled-search-alert-emails
http://answers.splunk.com/answers/56188/enhanced-email-alerts-anyone
Nothing has changed for 6.0 in terms of formatting the email. As before, if you don't like the email, you can either (1) edit sendemail.py or (2) create a scripted alert and do it however you prefer in your script.
Here are my favorite answers from many previous questions on this topic.
http://answers.splunk.com/answers/34570/how-to-add-custom-email-alert-content
http://answers.splunk.com/answers/2641/how-do-i-customize-scheduled-search-alert-emails
http://answers.splunk.com/answers/56188/enhanced-email-alerts-anyone