I have also received acknowledgement on 11th Jan..BC from India.. And upon contacting BC they said to wait till 28 days and after that they will be sending weekly updates.. Not sure how long the wait is gonna be!!
So close..with the current trend, you may need to wait only for couple of more draws for the scores to decrease below 470..Meanwhile you can try for maxing your ielts score as well if you dont want to wait that long..
If you are confident about your writing, I think you should go ahead with recheck, but expect a delay in the EOR results considering the delayed process in BC..