I don't think that there are really any 'bad' roads in the Alps as even the main through roads pass through very spectacular scenery. You will be sharing the road with a lot of heavy trucks etc but it wouldn't put me off. Many of the passes on the major routes are bypassed with long tunnels, for example at the St Gotthard you could go up and over the original pass or take the 17km tunnel underneath. Because of the availability of the tunnel though, the original pass is not very likely to be cleared of snow during winter as a priority.
I would say go for it as seeing the Alps under snow is well worth the effort.
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