there is no new rule. There is no defined limit for visa exemption entries. The immigration officer you will stand in front of will assess and decide. If you are worried get a visa
180 days I assume rather than 7 months, but I'm surprised you had that hassle with a DTV, just goes to show that even having a visa is no guarantee of being allowed to enter
you quote the guidelines given to immigration officers as to how to deal with persistent border bouncers. The rules do not define any limits for visa exempt entries, nor any limits for extensions other than the standard 30 days. So all one can do is take a view as to whether or not a visa is required, either that or wait and see what the immigration officer says when one stands in front of them