The Reason Remote, SDK, is an area that hasn't had many updates since version 3. A few new codecs, updated maps and the export remote info option but no remote items for the browser, toolbar and very limited remote items for the sequencer. Given the introduction to midi connectivity into web browsers through webmidi.js and other apis, extending the Reason Remote system with web apps can introduce new accessibility options, greater extendibility for mapping and monitoring and much easier methods for mapping for end users in place of LUA scripting.
Here's an example using refreshable Braille displays to give tactile output of VU/Peak meters: