@Gargron okay that's a valid start, strong opinions often uncover useful directions. However, no-one comes without bias :)
What's your #1 objective? Grow Mastodon? Get more users? Improve features?
Whatever that priority is, you need to baseline your existing work before making further changes. Then, as you make changes, see what impact they make.
You're only a small team, so it'll be hard to track more than one or two effects at once, so be judicious about what you want to track.
Finally...