we’ve just had the problem that we couldn’t override some css from the newsletter style.css. It turned out, that you use the !important rule a lot. Please, could you change that? A plugin stylesheet should never use !important, since it makes it hard to override in the main stylesheet. (I know that I can use the custom css section for that). In addition to that, it would be great to have a checkbox for deactivating the plugins css styles This should be the gold standard for all plugin developers. I know that I can deregister styles in the functions.php, but this would be a nice feature.
Thanks. Of course, I know how to set a filter to deregister styles. However, it is best practice to implement that in the plugin core. Apart from that, I really can’t see any reason to use so many !important rules in the plugin css in the first place. Don’t get me wrong. I really like your plugin. Consider it a friendly suggestion.