thecloud
As rhythm raced inside, the ship came alive
I think it's highly likely that this is all speculation.I think it is highly unlikely that Tesla would deliberately reduce the max charging rate at a site in exchange for adding more charging spots.
Tesla has either persuaded the local utility to increase the power available to the location or the utility did some local infrastructure improvement for other reasons and Tesla is taking advantage of it. Either way, it's good for us!
As CuriousG said, there is a non-zero possibility that Tesla has decided to add more charging spots to service additional cars concurrently during peak travel times, even though the power budget for the site remains the same. As utilization reaches 100%, more cars would perhaps be able to get "just enough" juice for the next leg of their trip without waiting as long, even at a reduced charging rate.
Clearly they would want to increase their power budget at the same time, but would it be a bad move on Tesla's part to add the spots first and then throttle as the total power draw from all stalls reached the allowed maximum?