My immediate thoughts. These are negative, but I am taking your idea seriously and I think it could work.
- Gates enable a lot of good automation. Automation no one else can really do effectively. You don't see it too often, but it's there.
- Gates enable a lot of "intelligent" systems. Redstone signals for internal state, etc. Unless you add a way to do this, you make every machine a black box that cannot be automated around.
- How exactly do you get liquids besides lava into tanks without BC pumps?
If you removed BC from your pack, it'd be making a strong argument for an equally capable item introspection system to actually enable lots of automation. There aren't many. The only one quite as effective that comes to mind is... OpenPeripherals. Which I know you will never-in-a-million-years include.
And when you say "Sockets" do you mean "Engineer's Toolbox"?