I’ve seen it generally recommended to sequence protein and fiber before anything else in the meal. So yes eating your carbs an hour earlier would in fact be worse for your blood sugar.

I’m not sure how it would be impacted if you ate the carbs an hour later though.

I think you risk overeating carbs, as protein and veggies are better at filling you up. The reverse might be okay.

From a dental health standpoint it’s worse because you’re having more individual meals.

I’m inclined to say yes. Separating the types of stuff which needs to be digested makes it easier to produce the required acid. This reduces the chances of developing digestive issues. Theoretically.