Yeah, the TF Stalker was a big bowl of "meh" for me. The sneering Sonic Commando was a weaker mold and the blue was wrong.
You could do a simple one using the 82 or 83 mold. The tundra Stalker could give you a nice one as well - but I thought V2 would also make a great Night Force guy too (my only attempted custom).
I don't think there was anything wrong with the blue, really, as it reminded me of some UK Tiger Force figures from the past. The sculpt they used for TF Stalker is without a doubt the worst existing Stalker figure ever to be molded in our entire solar system, and should never have been glorified as Tiger Force.