Beginning at block 58464, a new block will have to be 3204 seconds newer than the median time of the previous 11 blocks for my node to accept it.

This is a change.  Previously, it only had to be 1 second newer.

This is 6 block-times of 534 seconds each.  This allows the difficulty to rise at 12.3% each interval (2016 blocks).  This is the historical rise calculated from the genesis block to block 469573 of the bitcoin chain.  At a target time of 600 seconds per block, the block would be 3600 seconds newer.

You may wish to allocate your hashpower with this in mind.

In addition, the timestamp cannot be more than 1 minute in the future.  Previously, this limit was 2 hours.

These are some preliminary changes toward Hard Turtle technology.

I will monitor the situation for the unexpected.