To be honest I'm a little hesitant about the credibility of that source as it could easily be an exaggeration of what was said.

From the Mr. Happy translation:
- Summoners/Black Mage will see a big changes with their new actions
The important distinction being a big change with new actions specifically, which to me doesn't sound like the same thing as being heavily reworked from the ground up. More like the job will start to head in a new direction. Likely with greater pet usage. It was mentioned that adjustments will be made to certain existing abilities, but that seemed to be in reference to all classes in a general sense.

I do think SE has heard the cries of the community and the changes we can expect were most definitely influenced by our feedback, but let's not go overboard with expecting a massive overhaul.