Values rising again... I was able to build a small blogroll up after repeated reindexing, and eventually got values up so that I could reindex other blogs feeding mine to get the values rolling again. Took some time, but it's paying off now again.
Saw a few blogs drop out of the blogroll, can't tell which ones at this point, but it only created a minor hiccup.
Worst problem I'm dealing with now are new links coming in, and balancing outgoing links to match. Had two blogs crash outgoing value because the outgoing count fell too low, had to add more outgoing links and reindex before anything else happened to get those values back up.