1Mbps uplink would cause a severe hindrance for any remote work involving a team and heavy collaboration tools or videoconferencing.
It is annoying to upload large files, which was a task I virtually never had to perform.
I have no problems using zoom with only 768kbps upload. I was surprisingly impressed.
Slack remote screen sharing sucks, but I never had a problem with Screenhero. Chatting is fine.
I've been in situations like this in the past and would SSH to a build box that had a fatter pipe. Depending on the situation, it may be a cheap alternative.