We went in May, first time since the change and we were interrupted many times throughout our trip for "room checks." It was annoying and def. had a negative impact on our trip. I tried arranging a time of no interruptions during our afternoon naps ahead of time, but the CM said they couldn't do that as it was random and she said "doesn't happen often." It happened a good amount to us (our party consisted of me, a mom and 3 kids.)To people who didn't bother to use the latch. Which takes less than a second to engage. And I wouldn't call it "quite a few".
As far as the latch, that only works when all ppl. are in the room. If someone left for something or to hang at the pool while others slept, the latch thing really doesn't work.