> As far as negative feedback - yes, but isn't that what quarterly/bi-yearly/yearly reviews are for?

Absolutely not, no. The opposite of that. You never want to hear negative feedback for the first time at an annual review.

You don't want to be giving negative feedback every week, sure, but you do want to give feedback as close to the behavior as possible. Otherwise, you're just letting someone fuck up for months when they could be learning