What is a player going to do with a liner that has your proposed stats?
EDIT:
When you break FL ships down into the nitty gritty of what they do you get two types. Ships that are built for combat, and ships that are built Trading.
Liners were a bridge between these two functions. They had a decent trade capacity and a better the average ability to put up a fight. In this version that fighting edge was significantly lessened, but was exchanged for an improved trading capacity.
Now you wish to remove that trading capacity and leave an Osiris sized vessel that can no longer preform either of the above effectively. Making ships suit their "RP intent" is important, but you cannot render a vessel unusable in the process.