Isn't the whole point of League 3 (or the lower leagues at least) to compile all of these new regiments (and yes 2 months is new) into their own separate division? It gives the organisers and the regiments in question time to establish an understanding of each other. There is a certain stigma attached to lower leagues, namely League 3, but I feel this is unnecessary. Regardless of what league you are in this is still the most competitive and highly respected tournament in NW, meaning that all the leagues provide a high level of quality and competitive play.
With regards to the 22e and other new regiments applying, you must understand that your potential and skill as a regiment is not yet known to the community and organisers. It would be reckless for an organiser to place these new regiments in, say League 1 or even League 2 in some cases, without knowing whether you would have to right skill to compete in those leagues (having a majority of players which came over from a previous regiment does not necessarily equate to the same skill as that regiment).
This is true for new regiments. Mostly we look into: How well the regiment is organized or if the leader is known for being reliable, how well the regiment handled mischiefs and failures in their past and if there is something like a collective, eg. good friendship between the members. Nowadays new regiments rarely are "new", just a new composition of old players.