Cada potencial tiene asociado un nivel maximo para cada habilidad a partir del cual la velocidad de entreno disminuye considerablemente (al menos esa es mi lectura).
Esta en las reglas:
While all players can imporove their skills with training, not all have the ability to become superstars. Potential acts as a soft cap on player skill. When the player's skills reach the maximum their potential will allow, their training will slow down considerably, but will not become zero.
Reconozco que otra interpretacion pueda ser que la velocidad disminuye a partir de cierto nivel de las habilidades globales del jugador y que no es por caso puntual de cada habilidad, pero mi experiencia me hace pensar que es en una base de habilidad por habilidad.
Con respecto al entreno, las reglas dicen que un jugador completo sube mas rapido que uno que desarolle unicamente 1 habilidad. Tambien dice que cuanto mas minutos juegue, mas rapido sube:
For the other training types, players will improve more quickly not only with additional playing time, but also a more skilled player will improve more quickly. For example, a great inside defender and rebounder will find it easier to improve his shot blocking than a poor inside defender and poor rebounder would. This encourages you to develop players with a combination of skills, but there are many combinations of skills which work well together -- you can develop players who will be a good fit for your team's needs.
Salu!