The old saying goes "Why fix it if its not broken?" All these teams above, with the exception of Saints, are attempting to find an identity, a brand to market for the fans and success. We have all that in abundance!
Fulham, London, London Broncos, Harlequins RL, Quins RL, London Broncos, Have struggled for years to find an identity. This has had a detrimental effect on their fanbase. Effectively the nomads of SL.
The Vikings rebrand in conjunction with their purchase by the stobart group was also an attempt at marketing to a wider audience apparel which could be worn advertising Stobart but not instantly recognisable as a Widnes Vikings shirt.
Salford, hardly a rebrand, would just be like us removing 'Leeds' and the Rhinos head.
Catalans, again a team that have changed identity (more recently) and are striving to find that marketable brand. Their fanbase would suggest success!
I dont think we are being left behind. I think we are succesful, well marketed and easily identifiable. This, and the fact I have the badge tattooed on my right arm!