What can I say - I agree with almost everything here, and with time I hope we`ll work that in (by in-time I mean after Siegeworks expansion is finally ready)
With 4 though - it`s really a minor concern - and these hoses you build take more on a decorative role. But Yeah I guess we could make each house add couple of points less pop.
And for 7 - the game only supports shortcuts 1 through 7, that`s why. But it`s also something we need to expand on.