We have a "Shared Solutions" feature, but why it's working only inside one team? There must be a window, that allows users to share the solutions overall. Thus will help individuals and small teams, that can't compete with serious groups, but wants to be useful.
Wouldn't this greatly reduce diversity which is what the dev wants? The competition and points are for us but the end of the game is the diversity I believe.
It will get more quality solutions from our anonymous friends :) Diversity without quality is nothing.
In order not to reduce the diversity, maybe, this solutions must be marked as "public domain solutions" and if you are trying to evolve it, you can't save it as your group solution, only as "public domain solution".