-our notion for this game is "fast, fluid, and fun". The speed of all the units is not set in stone right now and that will come with balance, but ultimately, it will be faster paced. Everyone who saw the game in person loved the speed, but certainly, we're very early, so the speed is definitely something we will be tweaking up until the last moment.
2: Building Speed
-impossible to judge this, was for demo purposes only. The buildings will build instantly, but it is their BUILD TIMERS which will determine when you can place it down. The main goal here is, we didn't want the opposing player's building to be attacked while it was building, takes away from the strategic and fast paced gameplay. Don't forget though, you may be building an Obelisk of Light, but if the timer isn't done and you loose your power, sionora. Point here is, building speed is all balance and we've barely just started touching balance, don't judge the demo on this balance aspect
3: The Lifetime of the Buildings
-same as above, for demo purposes only we sped things up, this will definitely be balanced. The goal of a demo in a short amount of time, quite literally, show us the cool stuff. The lifetime of the buildings is definitely not realistic in the video but for the purpose of time and demo, we had to get thru everything quickly.
4: Walls, Gates, And Defence
-the answer here is simple, C&C 3 will have walls but they were not ready for this demo, so no worries, i think that answers your fears there.