Showing the rolls does add some flavor to it. Let's say the chance is that 50%. In other words, you need 11 or higher. If you roll a 3 you might go "wow that sucked". But if you roll 10, you might think "aah so close!"
Right now it's just hit or miss. Deal damage or don't deal damage. The upside of this is cleaner, less cluttered UI. But at the very least, you should be able to show it on the log by default rather than having to hover over, I agree.
