For me 2♣ emphasizes clubs (and only clubs). Why do we need so many ways to show 2-suited hands in this auction? 2NT as 5-5 majors seems a pretty good start to me. For me, 2♣ is 2-suiter (weaker than 2NT) because the ♣ bidder is behind me. 2♦ stays natural (same for 2M on 1M) cause I'm behind the bidder of ♦