I just played the game with the new patch an i also created  about 30 new worlds just to look what happens.

First the game crashed about 6-7 times within 1 hour never had this before.

I also did not see a lot of changes about the yields at all. There are stil a lot of 3/3/0 but some funny 1/6/0 also it seems that there were now much less magicfields in the near of rivers (or i just had bad luck 20 times ....)

and the mainbug (i sow this the very first time) the invisible river. it look like plains but it was an river on my last map i also was able to build the pier on the plains or better on this invisible river.