Does anyone have any insight into how the AI Overview feature in Google will affect ads?

I am setting up my campaign by margin, but if I run a Feed only, do I still need to set up different asset groups by category? All products are above 65% margin, but there are about 10 different categories. My ROAS goal is the same for all products.

What is the risk of changing the title in a feed as far as rankings and traffic. Does the potential out way the risk for a couple of weeks when Google is relearning the product? The ROAS is good right now, but I feel I need to have more keywords in the title to be more compelling to shoppers.

What is the next step if my campaigns are not reaching the ROAS goals? I started with Feed only, then added in assets and I am still not seeing ROAS goals that I need to. Do I start to break out PMAX campaigns by category? We are an ecommerce with 10k skus with 20 categories. I am also running Google Shopping (catch all), which is doing okay, better than PMAx.

Anyone ever had this happen on a new account? I am unable to contact Google through phone or email because it is a new account. I was finally able to appeal (kept rejecting it) - but it says it can take up to 5 weeks. Are there any best practices that I should have followed? I have been researching, but no results to how to fix. I work for an agency and we have several clients using the same credit card, could this be an issue?