Jordi,
Unlurking from the sidelines and speaking only for myself, some
comments on your proposal:
It is clear that there are small Internet Service providers (ISPs)
that do not currently have 200 customers, consequently is not
feasible for them to make "at least 200 /48" assignments in two
years. It is, however, unfair that these ISPs have no access to
IPv6 address space.
I'm confused. According to RIPE-267 (section 5.1.1), the existing
policy doesn't require requesters to have 200 customers. All that it
requires is that an LIR not be an end site, provide IPv6
connectivity, and "have a plan for making at least 200 /48
assignments to other organisations within two years."
Note it says "a plan". An organization incapable of coming up with
_a plan_ to allocate 200 /48s has more significant problems than not
having IPv6 space.