The last chances to talk directly with the J6 Project Team are on Sat 14th (at the NEC) and Wed 18th of Jan (in a webchat). More details, plus links for submitting comments below.
If you missed the Hampton event in Dec, please visit one of the other consultation events (details below), or visit www.highways.gov.uk/m42-j6 to find out more, and to find out how you can get involved. (When I followed the link a pop-up told me I had to login, but I ignored it, and found I could see the site without logging in.)
You can also contact Highways England via: email@example.com or 0300 123 5000