The team updates seem odd with everyone's response clobbered together. I'd much rather see the answers grouped by user rather than question.
My initial reaction was "that looks weird" (that they're grouped)... it reads like a status report.
However, the way something looks on a landing page isn't necessarily an indicator of what will work best in practice.
Real-life stand ups typically go around the circle once and people answer all the questions in one block because it reduces all the bridge statements like "that's it from me", "over to you, Dave", plus the cognitive burden of adjusting to different voices/accents over and over. Those reasons aren't such an issue with a textual re-cap.
I would do some hallway user testing (with printouts) before you go all the way to implementing a new feature.
Feature idea: DM @Jack "What did @john @mike @gsharma say for their standup today?"
I love your idea. It could also work for aggregation: "What did @john say this week?" or when there is multiple standup channels, querying for people who aren't in your team's standup.