The lack of supply chain also makes them effectively smaller than gun turrets as you don't need to insert anything into them.
A set of changes that would be nice:
- 1. Make them 3x3. This fixes the size comparison issue and makes it a little more difficult to create overwhelming fire
2. Make them have damage falloff. This means you can't just spam them deeper to account for the front line being less dense.
3. Make them more fragile. It's a laser with fancy optics, it shouldn't have so much health. Ideally also put it in a 'disabled' state if health drops below a certain amount as if the optics are damaged.
And a fourth, it would be nice if lasers took longer to repair than normal buildings to make an effective repair setup important. Again, fancy optics or whatever.