Since this is a post aimed at developers, I won't be getting into a debate here, but I'd like to briefly state my personal opinion.
In a nutshell, skills are all the skills you need to become a champion. Whether you use a dropship system or a POI system, both require skill.
However, the dropship system can be said to be flawed as a system for selecting strong players. The dropship system allows for rapid troop depletion, making it possible to climb the ranks without fighting. Of course, it is equally possible to climb the ranks without fighting in the POI system, but this requires a greater understanding of the game and a more skilled player.
The same is true for the initial fight. If it's a one-team battle, you may be able to pick up weapons. Furthermore, if multiple teams gather in the same place at the same time, it will be disastrous. Of course, you will need to have the skill to survive, but there will obviously be a large element of luck involved. With the POI system, you can always pick up weapons. You can also predict whether or not there will be an initial fight. Even if multiple units launch an initial fight, an experienced player can win and control the battlefield. Obviously, there is less luck involved. Of course, there is an element of luck involved depending on your initial landing location and arsenal, but this is minor compared to the increased luck involved with using a dropship.
The dropship system also makes it easier for multiple teams to team up illegally.
With the POI system, if you're a solo player, knowing where you'll be landing and what weapons are available in your arsenal before choosing your character will help you fill in any gaps in your teammate's composition.