I was at Verde about 9 months ago, it was a full moon and I was caught in a severe downcurrent which came about suddenly as we rounded a curve in the wall. There were no warning signs of other divers ahead in trouble or the fish struggling against the current. Dropped from 18m to 30m in a few seconds and luckily found a handhold to prevent further descent. The current was definitely too strong to swim against and almost ripped off my fingernails and mask as we clung on for dear life. As we hung there and contemplated possible escape routes, we started to use up air and NDL, and realised we couldn't stay there forever. Finally we decided to swim for it sideways along the wall but the current was still pulling us down, so we swam out into the blue and fortunately the current gradually abated when we were about 15-20m away from the wall.
This was the worst downcurrent I have experienced, and this includes 'interesting' dives in Raja4, Komodo and Penida. In retrospect, I'm not sure exactly what could have been done differently and whether it would have changed anything, but my humble 2 cents: avoid full moon/new moon, look for strange wave patterns/unusually still patches of water/whirlpools on the surface, dive close to the wall so you can grab on if absolutely necessary.
May those 2 unfortunate souls RIP. Anyone who thinks they can send up a DSMB/lift bag under these conditions is deluded and clearly has never been in this situation before. I am not trying to dissuade anyone from diving Verde, it is a beautiful dive site and I am heading back to PG later this week and look forward to 1 or 2 Verde day trips. But it does require experience, composure and skill to dive safely, and is absolutely NOT suitable for beginners/inexperienced/ 5 day back-to-back new OW/AOW heroes.