I lodged my application for a 186 through the TRT stream a few weeks back. I was advised to lodge it by many agents ASAP as anyone applying through the TRT is not yet affected by the changes.
As there is a high volume of applications being lodged the wait time has gone up from 8-9 months to 9-12 months.
I was hoping to have the application approved before the changes next year but this doesn't look promising. Hopefully the 'Grandfathering' terms will be favourable to the people who have already applied!