I would like to point out that the only reason the liners are currently being whored is because everyone knew that the cargo was going to be upgraded this version, so they bought them cheap last version and waited. In addition the liners are currently much more cost effecting then a comparable train, which needs to change.
The liners themselves are not flawed.
EDIT: Also fighters are a liners worst enemy. Most pirates are just to noobish to realize that you need to attack by the nose where the field of vision and targeting angles all suck. I get blown up pretty regularly because my tag is a giant shoot me sign.
