2 Motor drive even with V5 is subject do failure. During competition, especially if you gear for speed with 2 motors, you are prone to failure from motor overheating/burnouts. Since the cubes aren’t light, driving through piles of cubes on a speed 2 motor drive will slow you down and strain the motors. Additionally, if a team were to play defense on you when you have only 2 motors compared to the standard 4 or even 6 it is an instant loss. As other people have said/noticed, fast and powerful drivetrains usually are the better bots on the field. There are multiple threads on this, I’m saying this from personal experience and what ive read elsewhere.
I suggest designing motor sharing methods if you really need extra motors