Is Teams still being supported?

I’m as assistant editor responsible for setting up projects for the editors. We’re working on a show with 4 editors at once so we decided to try out Teams. We tested it first and it felt promising. Now we’re a day away from pic lock and Teams is failing us. It is going very slow, showing sequences as being edited that are not actually being edited, not allowing audio edits, and taking a very long time to export sequences. The most consistent advice I’ve seen is to slim down the project file, but I don’t see a way to even gage how large the file it. 

The posts in this community are all about a year or more old and I’m wondering if I’ve really stepped in it setting my team up with Teams and then not being able to provide adequate support. We’ve had to dump sequences into standalone projects to get around sync issues and then have duplicate media. Remove duplicates has no effect. 

What I’m really looking for is advice for a reasonable workflow for professional editors to continue to use Teams. We are unable to use Productions because we don’t have mounted / sharable storage. I understand we could still technically use it, but what we did like about Teams was the ability to immediately look at other editor’s sequences. Would anyone recommend switching to a Productions workflow without shared storage? 

Thanks in advance for reading.