I love the whole idea of zoomable and clickable graph but I am finding its use very limited at this time.
"Zooming" to select a range of hands works fine, but clicking on the other hand not so much. I find it impossible to find the right hand even when i am zoomed in to max.
I don't know if this is doable, but my suggestion would be, that instead of directly opening the hand history (most of the times wrong one!!), hand would get highlighted in the table bellow and its 5-10 neighbors shown with it. That way we wouldn't waste time trying to click the exact hand. This could work on Statistics and Results tabs.
Inside "Graph" tab, if neighbor hands would get loaded into Replayer together with the hand, that could work as well since table is not shown there.
Maybe if we are zoomed close enough, there could be a pop up with holecards and net won/loss, then selecting right hand would get easier.