approx every 30 minutes i receive message about finished precompilation for each gpu. is looks like not ok. just started using tweaking with rx550

It is ok, because this is how CN/R works. (precompiles program every 15 blocks)
It's just that previous versions did not display this to the user.

is there any way to store logs in separate folder? better if without hardlinks.

Separate folders for config, pools, logs

Code:

SRBMiner-CN.exe --config Config\config-normalv4.txt --pools Pools\pools-normalv4.txt --logfile Logs\log-v4.txt

Of course you need to create those folders yourself inside the miner folder