I just bled my brakes today. I can't get the spongy-ness out of the lever. I'm still considering the stainless lines but was hoping the bleed would have firmed up the lever. It didn't.
The brakes work the same as when I bought the bike but my other bike and even my scooter have a firmer lever.
I think with the ABS, there's double the length of rubber line. So that may be a factor.