I don’t think there has been an increase in repair and audit traffic at all. It just used to be drowned out by other test traffic. With the test uploads gone for now they stand out more. Why there is so much of it could have many reasons. I think Storj raised the repair threshold quite a bit from initial settings over the past. They probably just want to test this thoroughly and lower it only very carefully. While node churn is apparently quite low, there still needs to be a lot of repair when enough nodes leave. Suspension could also have quite a bit to do with it. Node suspension may be happening more right now due to the database locks. Suspended nodes have their pieces marked as unsafe, which could lead to repair.
Either way, repair logs on your node simply indicate your node is helping out with repair because other nodes went offline/suspended/disqualified. You either make money from the download or get more data stored from the uploads. So it’s actually good for you either way.
piecedeleter showed up since the delete queue was implemented. I think this log line used to just be a piecestore line, but was now moved as it’s a separate process. So just the new way it works, nothing to worry about.