On a larger map Cayra automatic rearrangement feature tries to squash too much of the map into a small space and thus ends up displaying nodes on top of each other and mangled links between then.

This results in a completely unreadable map.

Node and Link spacial awareness is key when automatically rearranging maps.

Instead of squashing into a small space add a zoom feature and make the scroll usable by dragging the mouse in white space areas.

In general a really nice app (I have used almost all the alternatives out there). Looking forward to all new features on the road map! :-)