Since last Pallada open API changes, PLUS plugin will reduce it functionality to redirect it on already available open API.
1. Planed help system is canceled by open API help system availability. See com.intellij.openapi.help.HelpManager.
2. FileTypeDescriptorManager coming to depricated state, becouse now open API have FileTypeFactory. But it can't be used now, becose of PeerFactory still scrembled. (See com.intellij.penapi.fileTypes.FileType).
3. AboutManager (building common about dialog for plugins) is seems to be unusefull... If you find them usefull please let me know, and i put it back to plus. Now, i removed this from PLUS library.
4. Localizer utility must be discussed, becouse, i'm hear about "it not used function" from one of developer. I can't understand why...