Is the txBlockRate parameter in the API correct? It's roughly 0.0141, which accounts for a block time of about 71 seconds, if my calculation is correct. Shouldn't that value be roughly 0.0233 now after the blocktime reduction to 43 secs?
blocktime fluctuates. It depends on many conditions such as the size of the block, network bandwidth and etc. So it is not strictly 43s but rather an lower bound. In general, the average is less than 60s.