http://images.akamai.steamusercontent.com/ugc/268346544589046489/29F5D3D8D31DC7EF458EA0BDA97DD0EE8329B287/

Tired of biters swarming through your gates and breaking your things while you're beating a hasty retreat? The first gate outputs G and opens when G > H, the second outputs H and opens when ...

The loading music should use the same volume as the in-game music. If everything is muted the user probably doesn't want the game making sound, including when it loads.

One possible nerf to laser turrets would be to give them a large charge time, 30 seconds or so, and have them prioritise large targets. They would still be useful to defend your base against big biters and big spitters because they would have more than enough time to charge in between waves, but ...

Like this?

If you want 11 iron in the chest, why not wire the inserter to the chest and tell it to insert iff iron < 11? Besides, saving a few ticks for an optimisation trick doesn't seem necessary.

What would be the interest in a mod that changes everything to look like diagram elements for screenshots and explinations? For example, it would turn this one into the other:
http://images.akamai.steamusercontent.com/ugc/268346059251686465/AB08EC05FAA441E28AEE704263D9A26305D45C4C/

http://images ...

Either would be better than the current behavior, though I would lean toward opening a new window in addition to the current one rather than replacing it. It would be helpful to have a combinator that tracked when resources were running low open in the corner full time, or for keeping an eye on a ...

Factorio seems to be a factory building game with some RTS elements, not an RTS with factory-building. A wider variety of enemies could be interesting, but the point isn't to be a difficult rogue-like.

Driving a tank through rocks and trees already does that.

Currently if you click on two objects, say an assebly machine then an inserter, the first object remains selected. It seems like more intuitive UI design to have clicking on an object always bring up its interface.

TLDR: Smart inserters should have circuit network values sent to their filter, rather than to a separate field.

This would not remove any features. A smart inserter in the current version with FILTER and CONDITION would be replaced with a smart inserter and combinators. The combinators would output ...

Constant combinators should have a special "everything" output that outputs a signal for every item, and decider combinators should have "everything" and "every input" as outputs, rather than "everything," which acts as "every input." This would bring their behavior more inline with the intuitive ...