Ya I agree, it would be nice to have a novice and advanced mode for the UI. D-Link is aware of users concerns. Not sure when or if any thing will change. I presume it would take a bit more memory and configuration to enable two mode UI like that while containing the additional features. Will see I guess. Over all the 868L has been a solid router. I'm on my 2nd 868L now. Gave my 1st away as a gift. I ran out and found another one. Great routers. 
Let us know hows yours does. Visit the forums when you need. Hope you enjoy. 
Maybe people are getting simpler and have shorter tolerance for learning things

And even I know, that I don't want to go back to DOS days of configuring boot diskettes xD
Might be one reason, why I haven't bothered to try different Linux distros nowadays, as I did constantly over a decade ago xD
But agreed, have installed quite a few DIR-655's for friends and even on a local registered association, they've been working fine.
I use to visit these forums quite regularly, to read what is happening on D-link world

So I will surely give my opinion sometime in the future.