I'm assuming the part about delaying guildleve history evaluations means the new system will be held off until 1.19a, rather than shafting us out of the bonuses granted for two to three weeks. Note that he only said the history evaluation would be postponed rather than the entire system.

Here's the original thread which makes the statement in today's letter somewhat confusing:
http://forum.square-enix.com/ffxiv/t...351#post329351