I totally agree. Going from one place to the other, I get lost, have to cross the smokers or have to go outside (without my coat because the cloakroom is somewhere else entirely).
It feel like "small bits, hanging loosely together"
I really think the Berlin Messe area is suboptimal for a conference like. There's nowhere to hang out and relax and network.
We have definitely noticed that about the venue as well.
If you haven't found it yet there is a lounge at the end of the hall.
Brady Forrest