Many thanks for the responses guys. Definitely no argument that the Mark V still has great use, I need to understand it this model before I move on to anything else anyway, but the new interface is definitely of interest.
Foxtrot you are correct I see the following threads available if anyone else needs further info.
New Update information
https://forums.hak5.org/index.php?/topic/36341-release-240-codename-tractosaurus-rex/page-2?hl=tetra#entry270195
https://forums.hak5.org/index.php?/topic/37715-will-the-new-web-interface-be-ported-to-the-mark-v/
https://forums.hak5.org/index.php?/topic/37281-mk5-support/
Firmware moved (please check other threads as this may be the incorrect way after posting)
https://forums.hak5.org/index.php?/topic/37788-firmware-downloads-moved/
Model Comparison
https://forums.hak5.org/index.php?/topic/37102-difference-between-mark-vs-nano/