Since your server is making the generation of the random it makes it no different than a static seed. You should offer the ability for both. Some people have lucky numbers.
The clientseed is generated randomly in the browser - not on the server. Having a static seed at a "per roll implementation" is not provably fair (imo) and allows the gambling site to cheat. Being provably fair should be more important than fulfilling someone's superstition IMO.
In theory a combination is possible, when using a hash of chosen
static clientseed + a nonce. Fixing the provably fair implementation should be the priority though. If this extra feature is really a big demand from players, they can always add this later.
PS, I agree the provably fair implementation is not yet perfect, as noted in my
last post in the previous thread. But it seems clear to me that the dev is working on it.