You've got my vote. This is the first time I've heard of either product and to me Element sounds closer to something I would check out than Riot.
I really like the philosophy behind the project and I will check it out. I would, however, recommend maybe marketing it in a different way. Let's say Slack added every single one of these features on the Element home page. My guess is they wouldn't market any of these same features on the home page because they really aren't what you use the app for (which I take it is messaging). While I agree that Element seems much better than Slack in what makes it unique there's nothing telling me that's it's easier to use than Slack. There's really even nothing telling me it's even easy to use, or fun to use, or will help me communicate better with my team.
I really like the philosophy behind the project and I will check it out. I would, however, recommend maybe marketing it in a different way. Let's say Slack added every single one of these features on the Element home page. My guess is they wouldn't market any of these same features on the home page because they really aren't what you use the app for (which I take it is messaging). While I agree that Element seems much better than Slack in what makes it unique there's nothing telling me that's it's easier to use than Slack. There's really even nothing telling me it's even easy to use, or fun to use, or will help me communicate better with my team.