Thanks for the feedback. I do not get your point. My suggestion aims to require previously accomplished player achievements to progress further, but in this approach you can always re-do raids that you qualify to do, as many times as you want, and this, of course, includes all previously done raids as well.
Thanks for taking the time to address my suggestions. AFAIK the planned progression is based on time-boxes tight to the release of the realm:
Would Kaer's progression design mean that someone that starts playing on Lordaeron after 6 months of its release will have access to all the WotLK content straightforward? If so, IMHO it will not be truly progressive, but rather temporarily [a period of 3 months after launch] progressive. Nonetheless, it is a matter of terminology and I think it is not so relevant in the end.
What I
suggested [coined constant and eternal progression by other private server], which is not a novel idea, forces/requires the players to do all raids progressively based on their current achievements (e.g., if you want to enter Ulduar 10 players, you require to have The Fall of Naxxramas 10 players; similarly, you need to have The Fall of Naxxramas 25 players if you wish to enter Ulduar 25 players; and so on). It is really a hardcore progression approach because you have to make raids with players that fulfill these requirements, independently when they started their journey on Lordaeron, to be able to move forward [content-wise].