Hey! Thanks for detailed feedback!
Yeah, breaking flow of resources by destroying pipes certainly should be included in mission design although my idea was that enemies will do that to the player, not vice-versa :)
Difficulty of 3rd mission has been ramped-up for the demo purposes, exactly as you said. It will be easier in next releases. I want to have difficulty setting but it adds a lot of work and it's hard to justify spending lot of time for content that half of the players won't ever see.
I'll look into units coming out from the buildings. Having them appear aligned with rally point is a very good idea, thanks!
I already did speed up the messages in the strategic view plus added some sound effects here and there so I hope you will like it more in the next update.