Vampyr, on 2016-October-25, 20:35, said:
Are you suggesting that a 2♣ response show natural vlubs or a balanced GF? It seems to me that this would require a lot of artificial followups unless you decided that the bid was GF even it it was just natural clubs. But perhaps I am overstating the difficulties?
I think now 1M - 2♣ is becoming more popular as ♣ (INV+?) or BAL FG. Ambra should be an example of introducing this over 10 years ago.
Just my personal opinion:
I think even 4♠ BAL FG hand can also put in 1♥ - 2♣, and 1♥ - 1♠ kept as 4+♠ non-FG or 5+♠ unBAL FG.
I even think that 5m332, or even 5OM332 FG can also put in 1M - 2♣. Of course in those case finding back the 5-3 fit could be difficult.
A even more radical thinking is that 4+M SUPP FG hand should also put inside, in order to listen to partner's (partial) shape (with some relay). The Jacoby 2NT can also be free up as other INV- raises.