So far, I've never DCA'd with blocks of holdings either. Nothing whatsoever against DCA as a practice, a built in feature of employer 401k's that has served employees well. And in this case DCA won't likely do any harm.
But I wonder about using "obvious problems" and "more downside than upside" as a reason to DCA. Upsides (and downsides) often come as a complete surprise to everyone - especially "the experts."
One of the most enduring investing adages comes to mind..."Be fearful when others are greedy, and be greedy when others are fearful (when the accepted consensus is way more downside than upside)." YMMV
Yup. And it is a clear case of market timing. But DCA'ing a large lump sum is also about overcoming the fear of a large market drop right after you invest the whole thing in one fell swoop. And it is also about going ahead and investing some of it now, regardless of what you think the market is going to do. If the market was lower or completely average I'd recommend investing all at once. Or if this was something that was going to happen many times in the future I'd go all at once and let the averages take over. For a one-time shot under these conditions I'd go partially with my hopefully reasoned expectations (not a gut feeling) and DCA. At least I'm not holding all the cash waiting for the perfect time to invest.