Hi, L. For what it is worth, I went through a box of this paper and never really got a "zinger" out of it. My experience has been that glossy lith papers have a stronger lith effect than their matte or chammy relatives, even with supposedly the same emulsion.
After I got fed up with it, started using Michael and Paula's Amidol with it, and it is lovely, a nice blue/brown split even before toning.
Only advice I would give, if you are going to continue with this paper, the Foma papers respond best in very weak, tired, warm developer. I usually start with 25mlA + 25mlB per liter of water (for LD20 concentrate; this seems to be ballpark for most concentrates).