Ok , as no one answered I upgraded to the Beta and look at it :
Broadcom BCM4331 802.11 Wireless Controller 6.30.102.9 (r366174)
from before 6.30.39.31 (r341183) .
Now I will test if this new driver is giving better signal strength stability and connection speed.
Update : have been up now for more than 12 hours , the Asus USB-N53 can¨t have a connection speed higher than 108 Mbps steadily ,
have it connected on the 5 GHz - band. The trougput is better than before , signal strength -25 dbm but on the 2.4 Ghz band I have a signal strength of -15 dbm.
inSSider shows a stable signal strenth on the 5 GHz band. A part seems to ve solved with the new drivers but the connect spped NOT.
Update 2 : Got an answer from Asus about the Beta firmware , first answer was that it was the same drivers as befiore , when I pointed out the that the drivers version was not
the same I got the following answer :
After double-checking, the BETA firmware does contain new drivers but they are no official release as we are still tweaking it for stability.
So there are still stability problems with the drivers. I just wonder how long we are supposed to wait for a solution ?
What Beoadcom driver version do you see ?