Yes, I have been using TRS to TRS cables for the expression pedal. I tried 2 different cables.
Today I disconnected everything from the profiler besides the instrument cable to the front panel and headphones to the front Jack on the profiler. I then went into the system settings Pedal Links (page 5 of 18) and made sure all boxes up top (Wah Pedal> Vol, etc.) were unchecked. Then went to each Pedal page (1 through 6) and turned all of them to Mode = Off.
I tested the 2 profiler connections on the back of the profiler individually making sure all other pedals were off before testing each. They worked as expected when using an instrument cable and/or a TRS to TRS cable. While Pedal 2 was still the only active Pedal where Mode was not set to Off I changed the Mode = Pedal Type 1, Function = Wah and used the TRS cable that was already connected to Switch 2. Suddenly the Wah is working.
Then I reconnected the Footswitch for morphing to Switch 1 with an instrument cable and turned the Mode to Profiler Switch in the system setting and now both the Wah and the Morph pedals are working as expected. The last thing to do was turn Pedal 2 to Mode = Off and reconnect the Remote with the Ethernet cable. Switched the TRS cable connected to the Expression pedal from the back of the profiler Switch 2 to Pedal 5 input on the Remote and turned the Profiler Pedal 5 Mode in system setting to Mode = Pedal Type 1, Function = Wah.
I could immediately see that the calibration status bar accepted the full range of the expression pedal from all the way off, to all the way on and then back again. After testing a patch, the same patch I had been using all along, the Wah and Morph pedals both work fine now. I'm not sure what the problem was or what was interfering.
As far as replacing the Ethernet port it needs to be done no matter what. It has become unreliable and I fear it will conk out on me during a gigging situation which, knock on wood, it hasn't done yet. It has happened maybe 5 times at practice sessions and a few times while using it at home. If I wiggle the cable it disconnects and sometimes takes more than a few wiggles or re-seatings of the cable in the back of the Profiler until it connects again.