The point of degassing is to take CO2 out so the yeast can settle better (nothing help keeping it afloat). Someone I think Yooper said that she only splash racks her wine, and never degasses. Forced degassing speeds up the process of getting the CO2 out and clearifying.
If you suspect that you still have CO2 and want to speed clearification then doing it more than 1 time might help. Personally I've wished on some Red's that I had done it again because I ended up with sediment in the bottles and it was anoying to clean. But that didn't affect the quality of the wine.