What kind of work do they specifically do to the seat? I'm new to motorcycling, but I always figured the seat I got was the seat I got. Just came back from a 600 mile trip and definitely wish my seat was more comfortable.Get your seat professionally redone. Don't buy an Add-on or a name brand seat. Talk with the heads of parts departments and service depts of various dealerships not just BMW and see if they recommend anyone. The guy that redid my seat had been doing motorcycle seats and high end cars, boats, planes etc for over 35 years, and only charged me $125 to completely rebuild my seat. I have been on many 400 plus mile days and love it. I now have over 12k miles on my 2018 G310GS and can not stress enough the stock seat is crap get it rebuilt.
28" inseam here - I feel your pain. I bought the BMW "low" seat and the trapped feeling was worse. Went back to the original.I'm 5'4" with a 27" inseam so unfortunately I don't fit the tall. In my case, I feel trapped between the tank and the hump.