Since newest update I'm bothering with fish not spawning in some areas,

if spawning barely not moving or there are just spawning 2 fishes in the area around after ten minutes.
Those realeased from a bucket before update are most of the time not moving at all, or spinning around in place. Nearly the same for the squids. The ocean looks empty, Turtles don't seem to be affected. No significant changes due to relog, a teleport to Nether or moving away 128 Blocks and coming back. More than 200 Blocks away after a while fish start to spawn normally. But not immediately as before it takes some minutes. 
As well I noticed most redestonecircuits working significantly slower, everything seems to be more or less laggy.