Selecting articles in the Content ACL App can be a very tedious process for sites with hundreds of articles. This can be made easier by implementing an "Include/Exclude" toggle button. Please do the same for the K2 Item Access Control.
Hey Dexter,
I would like to suggest you to submit for feature request at https://stackideas.com/voices/payplans. so everyone else on the site could vote for it as well. The team will usually prioritize features that are in popular demand during the development process of the next major release.