The Letter is up

[Isaaru]

It's not a PLAN unless it's stated explicitly, not generally.

Square posted the release of the patch would be at earliest mid-June meaning they had intentions on releasing it mid-June if all went well. There appears to be something with the development team that DELAYed the mid-June release. Their use of the phrase "at earliest" was used as a simple way of not promising anything like Yoshida has said he does not like to do in earlier letters. He was most likely aware that there could be a DELAY in development so he stated at earliest mid-June. Therefore, the mid-June release date of it was DELAYed to a later date, specifically two weeks from it.