The original UK version of Kitchen Nightmares (which featured Ramsay) was much less dramatic than the US version. Don’t get me wrong - there was still drama and the occasional conflicts between Ramsay and the owners/chefs he was trying to help. However, all of that felt like it came ‘naturally’ as events happened rather than the show being centered around it like the US one is.
Hopefully Seven are viewing Kitchen Nightmares as a post-8:30pm/9pm show (they would be fools to try and turn it into a strip show) and hence allow the show to be focused around (as you said) Colin helping the restaurants.