Seconded, in trumps. Thanks for bringing detail and clarity to the thread ^

So, ...
CCR/Gold/F pax use J checkin and the J-lane straight to the FLounge.
Silver/CW/CE pax use the existing H checkin and South Fast-Track.
Other pax also exist
Those arriving by Public Transport at the North end of T5 have only themselves to blame - we are always dropped off at the South end

Apart from the significant convenience for the first group, this should also speed up proceedings for everyone by reducing (to some extent) the load on Priority South. Regardless of snobbery aspects, it seems to be a win all round.