50 meters is 15d6 or 45 damage, typically. Enemies have been taking 45 dmg off 20 meter drops.Its too much damage. Its D6 per 10 feet in D&D and its too easy to cheese your way out of encounters with a cough.
What is the problem you are solving? Does your proposed change solve the problem? Is your change feasible? What else will be affected by your change? Will your change impact revenue? Does your change align with the goals and strategies of the organizations (Larian, WotC)?