These are interesting question, but I will start off and say question 9, 10, 11 sound like a server reset which won’t happen. But as for answering all them;
1) Yes, only if you get the pricing correct.
2) Yes, group Ironman has been suggested for a while now and I feel like it will allow players to enjoy Ironman gameplay more.
3) Yes, depending on which boss and which items. Nobody wants to go on a long dry streak for certain items. Need to find the sweet spot of the drop rates.
4) No, mainly because there are achievements regarding corrupted weapons, and plus it makes a gr