There is better teams currently in the championship than them that would miss out. Also you talk about expansion but what about Cumbria? Their is 3 teams in the champ at this present time and they are all better than the four teams you have mentioned. I'm all for expansion but it as to be earned not just thrown in like Paris/crusaders were.
There is a lot to admire about Skolars, Hemel, Crusaders and Toulouse and even Gloucester, South Wales and Oxford.
By the same token, there are any number of older championship clubs who are also worthy of admiration. They are also playing in better facilities and playing to better crowds, with the exception of the Crusaders, than the first group e.g Rochdale, Barrow, Workington, Doncaster, Leigh, Batley, Dewsbury and others. Even Oldham, in a very sub standard ground have attracted attendances much larger than their peers in Championship 1. Even Keighley are attracting attendances in the 6 to 900 range from the bottom half of the division.
How do you judge any one club more worthy of admiration and advancement to new divisions than others ? The league should not be picking favourites like that. Let them sort out on the field and promote the best four, subject to minimum standards checks. The geographical location of the teams should not come in to it. Let the best teams take their place on merit.