Checking back to this thread after some time now and I'm not really sure about how they would - if ever - implement the Webpage-Rig Manger.
Of course having a webserver running on the KPA that will provide that funcionality would be amazing, as it is the most versatile and professional way to configure/edit parameters for devices nowadays. On the other side, the Rig Manager Application for Mac/iOS/Windows would be completely obsolete. Only Updates for the Kemper would be necessary and the Webserver-part would come in the KPA update itself.
Not sure, if Kemper would turn around completely, after investing so much into the applications by now. Also I have no clue, if the hardware is even capable of doing this.