I think they were pretty open with their reasoning in their original blog post, and have been very responsive to the community's questions and concerns.
https://steemit.com/steem/@steemitblog/proposed-changes-to-steem-economy

If you are in the mindset that all of this is an evil conspiracy and nothing they say is going to satisfy you unless they confess to their 'evil plot', then I'm afraid you will probably never be satisfied.