I, myself, am a Belt collector (the $12 Jakks / Mattel belts and the $100 Commemorative Belts), so I wouldnt mind a redesign of both WWE and World Title Belts.
The Spinner never appealed to me, and I swore up and down that at Edges 1st or Rob Van Dams only WWE Title run, one of them would have change it. Then, after Cena vacated the Spinner and Vince presented Orton with the Title at No Mercy 2007, I thought to myself, What better time to change it, than at that PPV??. That wasnt the case. They stopped it from Spinning. They took out the Raw plate and replaced it with the WWE Champion plate. None of these minor changes did anything for me. The irony of it all, I have 4 different versions of the damn thing, and it happens to be my 2 year old sons favorite design. Target acquired, target locked, target sold. Its a marketing stroke of genius. You know the next Title cant be the Prestigious looking Title that looks like it belongs to adults. The grownups will not be buying the Belts. The kids (and people like me with OCD and having issues with completing collections) will.
As for the World Title, the Big Gold Belt is just classic. That Title probably should never change. Adding the W at the top is okay, only cause its so subtle. I personally would not replace it with anything else. I say either unify the World Title and the WWE Title together, dropping both designs and make a brand new WWE World Heavyweight Title or keep the World Title as is and just change Cenas.
Since TNA isnt using the name anymore, maybe the WWE can unify the top two Titles with a new Undisputed Title Belt and then have Booker T. come out with the Big Gold Belt and christen it the WWE Legends Title!! This time, however, keep it strictly to those who are actual Legends of the WWE.