W is advertised as causing few sexual problems but I severely doubt that adding it to L will give any more than a placebo benefit
you could try swapping from L to W, but assuming the L is working for your anxiety ( sometimes it doesnt), theres no guarantee that W will as its a differnet type of AD
AD meds alter rather than stop sexual pleasure, and some experimenting often helps, ask partner to help some stop their AD for about 5 days occasionally ands then have a romantic interlude 
others accept the lack of enjoyment for the AD benefits