The Grosse Messer as it stands is a decent weapon. However when you compare it to other 1h weapons it just doesn't compare.
Grosse Messer
weapon length: 85
weight: 1.3
difficulty: 11
speed rating: 99
weapon length: 85
thrust damage: 19 pierce
swing damage: 34 cut
slots: 1
7,410
Langes Messer
weapon length: 92
weight: 1.8
difficulty: 12
speed rating: 98
weapon length: 92
thrust damage: 23 pierce
swing damage: 33 cut
slots: 1
Secondary Mode
7,517
So you're sacrificing 1c and 1 speed for 7 range 4p and a secondary mode?
Arabian Cavalry Sword
weapon length: 105
weight: 1.3
difficulty: 13
speed rating: 95
weapon length: 105
thrust damage: 19 pierce
swing damage: 33 cut
slots: 1
6,900
Again sacrificing 1c and 4 speed for a huge increase of 20 range.
Niuweidao
weapon length: 88
weight: 1.5
difficulty: 10
speed rating: 101
weapon length: 88
thrust damage: 0 pierce
swing damage: 32 cut
slots: 1
6,058
Sacrificing 2c and a thrust for 3 more range, 2 more speed and $1400 less.
Military Cleaver
weapon length: 92
weight: 2.5
difficulty: 14
speed rating: 96
weapon length: 92
thrust damage: 0 pierce
swing damage: 35 cut
slots: 1
5,655
You get 1c and 7 more range in exchange for 3 less speed.
I think it should be buffed up to 21p and given a secondary mode, speeding it up would render the Italian Falchion useless. There are other weapons that need to be buffed but this is one that has stood out.