Is a player required to move on once they have gotten the required experiance to go up in rank or could they choice to stay with the rank they are on and continue to buy talents and skills? This question is especially important when it come to alternate ranks that give players options for the character they will not have once they move on.
Take for example the Genetor, what if a players wants to build up their Tech-Priest to get all the skills amd talents they would not have access to (especially at such early levels, or at all) once they move on to the next rank.