If you have new clients like Intel 9260 you can even enable 160MHz bandwith which will double WiFi speed on intranet (o/c you still stay limited to internet by your line).
I know RJ11 and RJ45 are fully compatible! Though some will complain that outer pins may be bent up, but usually they are elastically enough to go down again, and WTF we dont need them except you have ISDN instead of POTS and then you have to use RJ45 anyway.
Yes German AVM programmers do a good job, others in the world would or could do the same. But NOT Chinese and all other consumer products nowadays will come from there 
PS: You should go out for a walk and then do “something even better” too.
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