IMO no....I think they serve two different purposes. I can't imagine throwing my woc in a larger bag and using it as just a wallet. I think the LV wallets hold up really well and still look brand new after years of daily use. I have a mono Sarah wallet and it is still gorgeous. I have an 8 month old woc in caviar and it doesn't snap closed as tight as it used to.
WOCs is a classic style, so it will be around for a while especially if you are looking to get a classic color. Unless you really don't like the LV items you bought, then yes, do sell them. However, don't sell something you love because you will end up regretting. I love my LV SLGs!!!
I think it depends on if you have multiple wallets. I have a Sarah wallet which is my favorite. I bought two chanel wallets after and still almost always use my Sarah wallet. But if you have multiple LV wallets, pochettes or whatever then maybe sell some. I really like the woc, I have 4 now, and are my most used chanel that I own. I do tend to use woc now more than my mini or regular pochettes, but I would not use a woc in place of a regular wallet.
i have the zcp, woc, and other LV/Chanel wallets, between the two I love my LV wallet more than chanel ones. WOC can be used as wallet but the chains are heavy and not removeable, would not recommend it as daily wallet.
I'd like to add that in Germany it's also not easy to get a WOC, especially a classic coloured WOC in caviar. So if I were you, you should immediately call or go to the nearest boutique and ask - chances are high they won't have any, so keep calling and ask when they get shipments. I tried to get a caviar in black and never managed to.