1) Didn't try it in earlier versions, but if you have someone sitting in the "new hero" area with a wisp, they can give their money to another player and -repick then repeat to give someone a boost in gold/wood to start off. 2) Shared control still works (please don't remove this! I play with my laptop next to me so I can play 2 at once).
3) Got randomly disconnected (without dropping from bnet) on the laptop sitting next to me (desktop computer was hosting), was a level 1 AR sitting at the fountain for a few minutes while a ~20 master rogue was in the colo. Control was not shared at the time (seemed to cause disconnects in 1.01b). Will see if I can reproduce it.
4) Insta death still does not seem to crit, will post back after maxing the skill and playing longer on the new version.
5) Could you make the selection size on the hero (May only be the master Rogue) smaller. If you're standing next to a vendor and trying to sell what's on your wisp, you usually click on your hero. Since you can't move the wisp you have to be at just the right distance to be able to click on the vendor to sell instead of your hero. Same with picking items up that are right under you - you usually can't unless you move away and move back to pick it up.
6) Leech shield has a -5 corruption orb on it not listed in the description.
Moonlight: I had the same issue before when I had too many units and my hero died I believe. I didn't have enough room for the 5 food they hero took up and the hero icon was blanked out in the top left of the screen. I had to kill off some of my units (thankfully I had wisps) and was able to summon the hero from my base.