Still gathering requirements...
No, it has not gone yet.
I chased HMRC on Friday about an application I had submitted a few weeks ago and was given a verbal confirmation that it will be proceeding under ESC C16.
The confusion on this appears to stem from the Government proposals brought forward last December, when draft legislation was also published. This provoked objections from the Accountancy profession and HMRC agreed to consider the feedback and this led to the proposed legislation being omitted from the Finance Bill.
It therefore appears that HMRC are still looking at this and from what I have read, the Government intends to publish its response when they have completed their review.
One potential problem is that primary legislation would not be required to move ESC C16 onto a statutory basis as there is an enabling power at Section 160 of FA 2008 permitting the move to formal legislation by Treasury Order. If this route is used then Parliament has to have the chance to debate it.
HMRC have confirmed that there will be no retrospective implementation of any change, so there is still a window of opportunity and we are certainly fast tracking applications in suitable cases.