A little update after playing more and longer with the latest version:
1) Bots indeed are tougher than before
2) They throw smoke grenades and flashbangs
; they veeeeery rarely did that in previous versions.
Now they do it pretty often.
Although they throw flashbangs in strange directions, but I know it's hard to code that sufficient. Smoke grenades are aimed better.
3) There's really a great improvement of the unstuck code. Bots still get sticked up each other but they are unstuck much quicker
4) They duck more when you face them on surprise.
5) CT-bots sometimes just rush in a bombsite after the bomb is planted and try to defuse while the place is covered with T's.
That's it, I can't come up to other experienced things right now.