That question is harder to answer than you may realize. The short answer is 'Yes, the Foodcoats archetype is still a top-tier deck, and will likely be represented in the top 16 at worlds.'
The long answer is: It depends on the meta you play in. Some runners are stronger against Foodcoats than others, but the runners who are strongest against Foodcoats will likely struggle against other dominant corp archetypes, therefore in a larger tournament Foodcoats will do better, but in a smaller tournament it may appear weaker depending on the runners it faces.
Foodcoats is an ICE-heavy glacier style deck that relies on expensive ICE that the runner can break, but cannot afford to do so repeatedly. In the past, multiple runs were forced by the corp using defensive upgrades such as Caprice Nisei and Ash to deny the runner access to the scoring remote. Rumor Mill blanks both of those cards, so they cannot be depended upon in certain match ups.
Instead, HB can fall back on its standard 'never advance' game plan, where a new card is installed in the remote every turn, but none are advanced. The runner has to decide to run without knowing if an agenda is in the remote or not. If the runner ignores a 3/2 agenda in the scoring remote, then the corp can score it in a single turn. Other cards to install into the remote are: Defensive upgrades (Ash and Caprice) Economy cards (Adonis, Eve, and sometimes Launch Campaigns and/or Breaker Bay Grid), or even a Cyberdex Virus Suite.
The presence of Rumor Mill also makes a corp current, typically Enhanced Login Protocol, more important to this archetype than it was a year ago. ELP taxes the runner an extra click when they choose to run, which pairs very well with the taxing Bioroid ICE, and especially Fairchild 3.0, which cannot be clicked through when the runner has to run through ELP's tax.
ICE destruction is a significant challenge for this deck, as it depends on ICE taxing the runner to keep them from making frequent runs, particularly on the scoring remote. Currently, the Two-armed ICE Feast is a somewhat weak runner compared to the alternatives (Temujin Whizz, Nexus Kate, Andy sucker, and maybe Stealth Kate), but Parasite + Datasucker is still popular for Temujin Whizzard. CVS can buy the corp some time, because they can rez and fire it as the ICE is approached, when the runner is committed to encountering the ICE, but before they have the opportunity to interact with it. A well-timed CVS purge can be very important, particularly if the runner does not have a way to handle the ICE they are encountering without using Datasucker counters. CVS is also a way to buy time against Medium digs (though your R&D should be too taxing for the runner to run against it repeatedly).
In addition, the Yog.0 + Net Ready Eyes + ICE Carver effectively destroys code gates up to strength 5, which include Fairchild 3.0, which is supposed to be one of our best pieces of ICE (and it's economical buddy, Ravana 1.0). Normally this combo will take a while to set up, but it is the expected late game for Temujin Whizz. While Foxfire has long been a joke, it is a relevant card for this match up (and also Net Mercur for Stealth Kate and The Turning Wheel for Andy Sucker, the odds of trashing a Link card against Nexus Kate are slim). If the runner pays through the trace, it still taxed the runner 6-7 credits for nothing more than a click. This is a pretty powerful effect for such a low cost, and it is relevant against most of the top-tier runner match ups.
The emergence of Temujin Contract makes it difficult to keep a second economy remote ICEd, particularly against the very efficient runners that we are seeing in the top tiers. Some ICE will have to be diverted to archives, so it seems likely that Eve Campaign will not be a strong fit. I am not a top-tier player to suggest the best alternatives, but I would try shifting some ICE to be slightly cheaper and use Launch Campaigns in the place of Eve.
So Food coats is still strong, but it needs some hate cards to counter strong runner strategies. I would recommend 2x ELP, 1x CVS, 1x Foxfire, and 1x Archived Memories. Again, I am not a top-tier player, so someone else may have a better read on the situation, but I think this is a fair assessment of the basic situation. It is challenging, but not insurmountable. If you want to play with lots of money and ICE defending your servers, Foodcoats is still the strongest example of the glacier archetype, and a reasonable if not strong contender in the current meta.