Chrome doesn't add settings for things when extensions can do the job because doing so adds to our support burden and slows further development - it's better to appeal to fewer people and have a simpler and easier/faster-to-maintain product than to appeal to more with higher maintenance complexity.
Glad to see they are paying more attention to this though.
Thousands of people have requested that feature for Chrome. To this day there hasn't been (or I haven't found) an official answer and the only way to do it is to use an extension, using an alternative keybind as extensions aren't allowed to interact with ctrl-tab.