NewExecutionPayloads: this used to be the NewBlocks stream, but we've renamed it to avoid confusion.
NewExecutionHeaders: a stream of execution payload headers (no transactions). This stream is expected to be 10-30ms faster than the NewExecutionPayloads stream, because the headers get propagated internally without the payload, making them much smaller and faster to propagate.
NewBeaconBlocks: a stream of beacon blocks stripped out of the execution payload to make it more performant. You can think of this as the beacon block header.
We had a memory usage regression causing memory leaks with the last upgrade that is now fixed.
Stale transaction filtering:
We reworked the transaction pool implementation for much better validation and stale transaction filtering. The probability of getting a transaction twice is now much lower, and the probability of getting a confirmed transaction should be close to zero.
Additional node deployments:
We've deployed 2 additional nodes for better network coverage in important locations.