My score in the Dec 2017 Schweser live mock was absolutely awful. I think it was something like 48% for AM, and 55% for PM. I hit the qbanks and mocks for the next couple of weeks, and I passed L1 fairly comfortably. I think it was certainly tougher than the real thing, but I also think you’ll pick up ‘adrenaline points’ on the day. Don’t sweat it, stick with the plan. I’ve mentioned this several times, but when I was at the point you’re at now, I was contemplating not even showing up. You can do it.
Can’t comment on the Schweser mocks for this year, but I just took the first mock of last year’s Schweser pack and got slightly lower scores compared to the CFA Mock (71% vs 75%). The ethics questions definitely seem a bit trickier and the questions in general seem to focus on the things you tend to forget. It’s a good way to find the gaps.