Agreed re tags. This is something that was discussed during the late beta phase. There is also another post re this and an active feature request:
How do I display a Tag in the Timeline?
Hopefully this means Tags will make it to the Timeline. I also advocated for custom properties to be featured on the Timeline. Wordy text properties might be a challenge, but truncated property display combined with hover to reveal full info would work well in that instance. I rely on custom properties heavily in certain areas where relationships don’t work. So I really feel their absence.