If they are Xcel Diamond or Sapphire, it would be easier to transition smoothly.
Challenges/Disadvantages and Advantages will depend on how their gym handles Xcel versus DP, or how their current gym handles Xcel versus how the new gym handles Xcel and DP.
Challenges/Disadvantages (especially if transitioning from Platinum or below):
-> Cast angle deductions are bigger (and are taken on ALL casts except cast squat or pike on).
-> Split angle requirements are higher (180º) and deductions are taken if too low.
-> Level 7 Vault to the mat stack. This isn't as big a deal if they are just scoring out of L7 to move on to L8 from Diamond or Sapphire. Mine didn't petition into L6 because of the vault.
-> Potentially a big jump in hours while navigating high school
-> Potentially higher costs and more travel meets
Advantages (especially if transitioning from Diamond or Sapphire):
-> Potentially more competition
-> The possibility to advance (with the necessary skills) to DP Level 9 or 10 before graduating High School (and the possibility of attending L9 Easterns/Westerns or L10 Nationals).
-> Potentially more time in the gym
-> Potentially more travel meets