Hey 777kme , we did actually change the appearance of shadows. The sharpness in this case now depends more on the scene at hand. We have an existing feature request on our agenda to allow you to change the sharpness yourself, I've given the topic a further upvote through your voice. If there is anything else you want to add to it, please kindly let me know.
Add me too on this feature who would like to control the shadow sharpness, or at least be the same as it was in v2.3.
Here is a comparison of between 2 versions - no post render edits:
Same scene, time and settings - both sketchup and enscape..