1) Restarting alarmd is not necessary; resetting MCE does the trick, partway. After that reset, the tablet dims after 90 seconds, blanks after 120; thing is, my control panel is set for 10/30. Opening the control panel and just pressing OK is enough to get it to where it's supposed to be -- maybe. If I apply the C.P. immediately after resetting MCE, I get a 10/120 cycle, but a second application of the C.P. gets it right. 2) Each time I restart MCE, the screen brightens (my default level is 40). When I map ASUI, my "40" is shown in white, but below it is a "76" in blue. As soon as I touch a level control, brightness drops down to the expected level. This 40-over-76 state persists across dim/blank cycles.
Perhaps unrelated to the blanking failure: I have twice seen ASUI's power meter pegged at 100% and staying there; mapping to ASUI shows normal CPU activity of just a couple percent, but back the desktop and the meter continues to be pegged. May be related to rebooting with WiFi enabled, rather than in Flight mode, but I haven't figured out a sequence of steps that makes this happen for sure.