Here's my 2 cents worth of comments on this subject:

1. IGC Club Class is intended to allow racing between gliders within a
narrow range of handicaps. The reason for the narrow range is to
allow handicapped competition to work across all types of tasks, in
particular, assigned speed tasks. Increasing the range of handicaps
puts the gliders at the low end of the list at a disadvantage (despite
the "better" handicap) when assigned tasks are called on days with
significant wind.

2. Viewing Club Class as an appendage to Sports Class pretty much
guarantees assigned speed tasks will almost never be called, which
sort of defeats the purpose.

Having owned, and occasionally raced, a DG-101, DG-303, Ventus B, and
LAK-17A, I can say the Ventus (15M) was far closer in overall
capability to the LAK-17A (15M) than to the DG-101. An IGC-style Club
Class, with assigned speed tasks, where I could actually feel
competitive in a Std Cirrus or DG-100, would draw me back into
racing. An MAT and TAT laden subset of Sports Class, not so much...

Marc