Both of these are in 1.8.0, unknown stars start, 1 npr 1 player race. I generated a second race on Mars and SM'd in ships to test with (taking tech up to maximum for a lot of things just to add extra range, tougher armor, etc for most things)
Unsure if WAI, but with No Maintenance enabled, ships will still suffer maintenance failures during combat, consuming MSP if available as normal. The description for the No Maintenance toggle makes it seem like this shouldn't be the case.
Also, when setting a fleet to Sync Fire, if all ships reach synchronization but some are missile ships and some are direct fire ships, only the ships equipped with missiles will actually fire, and the others will not fire (and will continue to "await readiness" from other ships in the fleet, never to actually fire as the same process repeats over and over) This occurs even if the direct fire (in this case, railguns) weapons are set to target a ship, and the missiles are set to another target entirely. Only the missiles will fire.
Edit: I actually edited the designs and had only beam weapons and still they would not fire, even with every ship in the fleet displaying "awaiting readiness" in the event log for several increments. It seems like Beam Fire Controls don't like sync fire. This was using a mixture of Railguns and turreted guass cannons on respective designs for each.