That's not exactly what I meant. Quoted EULA comes from WoW installation. It talks about client and how you can't copy or resell it and how you can use it to access service. EU court decided that the part about being unable to resell is void. So yes, you can resell your CDs, or even give WoW data on a USB. But it doesn't mean that Blizzard is supposed to unattach cd-key from your account.
Because account is totally different, and quoted EULA does not apply to it. Because it has its own EULA:
Now, battle.net account does not belong to you, it's a free service provided to you by Blizzard. You don't buy it, you don't own it, but it has your name on it. When you buy a game and use its cd-key to activate new service on this account then you modify something that isn't yours. When you play, you connect to servers which are not owned by you. Client which you bought only lets you access those servers, this service. Client is not a game.1. Grant of a Limited License to Use the Service. Subject to the terms and conditions of this Agreement and your agreement to and continuing compliance with this Agreement, Blizzard hereby grants you a limited, revocable, non-transferable, non-sublicensable and non-exclusive license to use the Service solely for your own non-commercial entertainment purposes by accessing it with a web browser or an authorized, unmodified Game client.
2. Additional License Limitations. The license granted to you in Section 1 is subject to the limitations set forth in Sections 1 and 2 (collectively, the "License Limitations"). Any use of the Service or any Game in violation of the License Limitations will be regarded as an infringement of Blizzard’s copyrights in and to the Service and/or Game. You agree that you will not, under any circumstances:
(...)
2.5 let any third party (except for a minor as stipulated under Section 4 below) use your account on the Service or for a Game;
(...)
9.2 Account. NOTWITHSTANDING ANYTHING TO THE CONTRARY HEREIN, YOU ACKNOWLEDGE AND AGREE THAT YOU SHALL HAVE NO OWNERSHIP OR OTHER PROPERTY INTEREST IN THE ACCOUNT, AND YOU FURTHER ACKNOWLEDGE AND AGREE THAT ALL RIGHTS IN AND TO THE ACCOUNT ARE AND SHALL FOREVER BE OWNED BY AND INURE TO THE BENEFIT OF BLIZZARD. Blizzard does not recognize the transfer of Accounts. You may not purchase, sell, gift or trade any Account, or offer to purchase, sell, gift, or trade any Account, and any such attempt shall be null and void.
Since account is not owned by you, you cant resell it (including additional services and items on it). And you can't give it to someone else, which is obvious, and EU law does not protect you here. You owned a cd-key, but you stopped owning it the moment you put it in an your battle.net account, which you didn't own, to activate new service.
Diablo 3 you buy is not a game, it's just a tool to access a service. EU court ruling was about games with DRMs, mostly Steam / Ubisoft / Origin ones. Because there you have a full game on your PC, not just a tool to access a service. At most, it could apply to Starcraft 2, since it can be played offline, and logging in acts mostly as a DRM.
And partially that's why game companies move from selling games to selling sevices. See new Simcity - it's being turned to half-MMO. And EA plans to make most of their games in this model.

MMO-Champion
90% of Americans are not educated people which know just f*uck , personal knowledge ( One American took to Alps just credit card and asked in village why is not possible pay with credit card , crises , etc. )