What is the reason for postponing MAIN SALE 26 MAY 2018

Is this a good or unfavorable signal for investors? A week before the previous date, suddenly this? Does anyone know this how can it be related to the certainty that the upper lath will be reached and the declared amount of currency collected? Of course, I do not doubt the project and the team - but such sharp movements on the eve of the main sale - are justified?
I advise you to read the article, there everything is written in detail.
https://medium.com/@Acorn.Collective/our-biggest-news-yet-3-major-advancements-at-acorn-d6c1cdc6fcff"The changes weve made to our platform and token model represent a MAJOR revamp of Acorns whole business model. In addition, our value proposition to potential ICO contributors has gotten much better.
All these changes however, require a complete revision of all our documentation and updating our existing community with these changes. From a logistical perspective, this means that we need to revise all of our documentation including the whitepaper, with lots of modelling required to ensure our new proposition is watertight, both commercially and legally. Our legal advisors will require time for a thorough review of the new document and token model, so as to ensure OAKs status as purely a utility token, is not threatened in any way. With such huge advancements in our platform model, we also need time to spread awareness and market our relaunched proposition. More partnerships are also in the works these conversations take time, and well have some pivotal announcements to make in the coming month."