The skill would not get anymore levels beyond since the game is balanced around those hidden stats.
Im not sure what are the numbers of all of those skills progressions from 99 to 100 but you get the point.
reward: players get to retain your current perk levels while levelling, perfect for those who level that requires gold resources (speech, smithing, enchanting, alchemy). That way, tasking with a maxed level skill is not wasteful.
risk: levelling is harder since it follows the path of almost maxed out skill.
but if players want faster character level, the player goes to the "Legendary" path.
thoughts?