Yes I have indeed noted that signage is generally poor. Even the roadsigns are not illuminated at night, and most things are displayed through symbols only. I defy anyone to find the car rental return location on a rainy night without prior knowledge !
All in all I am really not impressed - not seeing much improvement over “old” SXF (again TXL was in a different realm, jsut as THF), except maybe being able to take the S-Bahn without leaving the main building (which could have been done with the old terminal too, and the way they achieved it via this massive loop is just baffling) and being able to board without a bus ride, which was indeed uncomfortable at times. But for me it certainly doesn’t outweight the convenience & practicality of previous facilities.
I’m asking again - is T5 to be reopened ? Are LCC paying a lower airport fee yet using the new terminals ? Otherwise they might feel played…