Riker shows up with a fleet. He tells Oh he'll kick her Tal'Shiar ass in the one of most bad-ass stare-downs in Star Trek history... and then some people went up in a fit of outrage over the ships. As if that mattered more than seeing Riker in all of his glory.
Sure it looks like they xeroxed the fleet, but it's such a short scene that I cut them some slack. I'm sure they'll design more brand-new 25th Century Starfleet ships along the way. Whether it's in Picard or somewhere else. Or at least HD CGI-render some earlier TNG+ ships. No big deal.