It is unable to display the tuner like the Remote. This could be a negligible problem for some or a very big problem for others.
Hey nightlight,
the Gordius controllers can show the Kemper tuner on their display alright. You can see that in action here : GORDIUS LG2 controls the Kemper Profiler (around 0:40)
Problem is (or was - until today) that this only worked in the special "Kemper integration" mode, which turns the LG2 into a Kemper slave controller (much like UnO4Kemper or the Remote). In that mode the Kemper controls the Gordius LEDs, keeps effect states in sync, shows rig names and effect names on the Gordius display, and also shows tuner info. Apart from that you can define up to 625 macros, one for each rig in performance mode. This way each selected rig can trigger a stream of extra MIDI commands to control other gear.
Reading your great review today I realized that actually you lose a lot of the advanced Gordius functionality when activating this "Kemper slave" mode. Therefore I did a small upgrade to the firmware today. You can now choose to show the Kemper tuner info, or show tuner info plus rig names and effect names on the LG2 screen, without activating the full integration. Just drop me an email if you are interested in this firmware version - I still need to document how to activate those new "limited integration" modes.
Cheers,
Xavier
GORDIUS