When you get to the point in SEQ-A where you want to dive in, just press Shift+T (the shortcut for Reveal Nested Sequence). You need to have the tracks targeted, but that will take you into SEQ-B at the matching time.
Thank you! I didn't even know what to look for for that one.
Yeah, it's pretty hidden--as you said, you need to know what to look for. I think a feature request to have it be somewhat more discoverable--in the Sequence menu or on a right-click menu, for example--would be appropriate: Adobe Feature Request/Bug Report Form
I wouldn't mind being able to see the time of the selected clip too. Like when you hover the cursor over the clip, you see duration, in-time out-time, but what about CTI location for the selected or cursor hovering clip...
That's useful info too. But your tip works well, even though targeting the layer is a bit out of the way.
It would be nice to have the option when double clicking a nested sequence to go to the CTI (if available) - or for example CNTRL+Double Click or something.
but what about CTI location for the selected or cursor hovering clip...
Have you checked out the Info panel? It will show you the timecode of every clip on every track wherever the playhead lies. Not saying that what you're suggesting isn't valid--though I think it would be too difficult to be accurate when zoomed out in the sequence--but I think the information you want is already there.
I'm not sure how a double-click would work; would it respect the clicked location or the playhead location?