With the 2020 and further bus gates, it will be important to have bus gate turns very effectively.

Some kudos this time. I had a 40 min connection at HEL. From ATR plane to ATR (horrible is that...). Incoming aircraft parked right on time. Bus was ready. From incoming aircraft door opened, it took only 15 minutes and I sat in the next bus to the second ATR flight! Disembarking first one was efficient, bus ready, had a quick pass-by at gate to see it was about to board, went a quick hop to the lounge and had some food (well it was more of a army-camp lunch style in 1 minute ), trumpeted myself to connecting gate, boarding last and directly to bus. Wow.
This was all during peak 4pm hours!
I want to see this more in the future, otherwise HEL will become HEL*

The worst part was actually moving in the aisles of HEL, it is a nightmare during peak hours. Mind you someone must come up with the idea of squeezing a couple of more boutiques there then...