I found the easiest way to open it was to do like described, but to increase leverage it helps turning back and forth a few times each time trying to go a little faster when turning counterclockwise until you got enough speed to release two clips.

Agreed. Just replaced the battery on my 15” MacBook Pro 2015 and I skipped all instruction between step 6 and 46. I just unplugged the battery and removed the trackpad connection. Used some dental floss to cut through the adhesives and a card to help with carefully prying the batteries up. After the battery was removed I used some isopropanol to clean up from the old glue. Installed new battery, attached the trackpad connection ribbon and connected battery. All in all it took me less than one hour. I would not recommend removing the whole logic board just to replace the battery.