Like chumboy, I've spent more years than I care to remember chucking a tandem of nymphs with the dropper fly tied to the bend of the hook of the bigger fly under a strike indicator...it ain't the purist approach, but I've caught a whole bunch of really big trout this way.

In fact, what you describe in this tutorial, zonk, is exactly the system I was just using east of the mountains for steelhead only with standard rounded Gami hooks.
Using these VMC hooks definitely addresses one issue with my age-old system, namely, when all barbs are pinched as required by regulation, what stops my dropper knot from sliding right off the hook? Honestly, I've fished these dropper rigs for years and I've never actually had it happen, but it is a logical concern. Your idea is worth trying especially if these hooks also lead to a better hook-to-land ratio as advertised.
By the way, our WDFW regs on this subject are as follows:
SELECTIVE GEAR RULESOnly unscented artificial flies or lures with
one single barbless hook are allowed.
Up to a
total of three artificial flies or lures containing
single barbless hooks may be used. Bait is
prohibited; fish may be released until the daily
limit is retained. No one may fish from any
floating device equipped with a motor, except
where specifically allowed under Special
Rules for individual waters. If any fish has
swallowed the hook or is hooked in the gill,
eye, or tongue, it should be kept if legal to do
so.