| Yes, one of the down sides to Ohlins forks. Come to think of it, must be the only down side. Well, price too, I suppose.
Ask any 888SP4 owner how often they replace fork seal! Race forks are even worse with a expected service life of 50 hours!
There are a couple of things that help maximize fork seal life. One, make sure you keep the stanchions meticulously clean. Seals mainly fail due to contaminants. Second, use Ohlins grease (looks like green slime) on the stanchions and bounce the forks in order for the grease to work into the seals. No guarantees, but should help some. I does for me. I can just about get a seasons racing from one pair of seals. | 
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