Slicer tools is indeed a lot of points if you expect to actually use it to cause damage. However, it works great as a tool for limiting your opponent's options. There is a significant advantage when you can K-turn or PtL freely, but your opponent will be punished with automatic damage if he responds in kind.
Yeah, they make it so that your Transport and it's 40-50odd points ends up in flames first. Not always a bad thing, but keeping it alive until late game makes it nigh on invulnerable.
The transport being the top target on your opponent's hit list is likely a foregone conclusion regardless of its contents.