The add-on comes with all rules activated, unless they are default=off (or its category is default=off). If that’s not the case for you, could you send a screenshot of the situation where a rule needs to be activated?
I think the “Enable all” button has been there for a long time. But why activate these rules in the first place? There’s usually a good reason they are not activated by default. If there are rules which are not activated by default but should be, we should discuss this.
It’s okay. I just thought that rules such as the checking of period at the end of sentences and such should be on by default, since they are useful while writing on Facebook and alike.
But it is okay since I now noticed the “Enable all” button.