(Feels a bit like crossposting)
GA has been pushed back so the client has more time to be polished. Also, letsencrypt is not the only ACME impl. as has already been mentioned. Way too trolly.
I've already answered to it here. Yes, these are problems to work on and propose solutions, not get all dramatic about, esp. considering LE is closed beta. Your feedback is fine and even good; the way you deliver it (not constructive and whiny) - not so much.