I don't have a problem with the reveal. The way it works now, once you have a few cards on the board adjacent to each other, you go through the following:
1) "Okay, we're in a safe zone, you can stop now."
2) "Okay, it would be REALLY good to stop here 'cuz you'd be close to another card."
3) "Oh, dammit, we're in a bad zone now, don't stop here."
4) "Okay, we're back in a safe zone, stop anytime..."
Using the Power Of 10 reveal would ruin all of that and be no better than just flipping the card over.
Which, for my way of thinking, works pretty well. I was also impressed at the way the reveal just jumps to the end at the point where you are officially screwed (because you are higher than the lowest card that does not have an empty slot above it). Thought that was a nice little touch to recognize that. A lot of people wouldn't.
Overall I liked the assessment of it being "high-stakes Rack-O." The first few cards play themselves, pretty much (since you don't know which 40 are on the board, you're kinda forced to assume it's an even distrubution and play them accordingly), but it definitely gets interesting after that.