If it is leaking you need to fix it if possible. If it is leaking from the shaft area below the steering wheel that will most likely be the outer seal. If it is leaking from the back I would check the hydraulic fittings/hose connections. If it is down on fluid or has air in the line that will cause it to feel lose/sloppy/delayed/have play etc. If it were mine I would buy some Seastar fluid and assuming this is a single station system or is the highest helm in a multi-helm system top up the fluid and then crank the wheel from side to side all the way a a few times and see if it feels better. If there is air in the hoses you may need to bleed them like car brakes but I have found that sometimes the fill and turn method works if the internal reservoir has not gone down too much. I guess it is possible the helm could just be worn out but both mine are still strong after about 12 years of heavy use, they seem to be rather robust systems.