RE: Why is SBD well below USD?
Therefore, there is now a problem with SBD and even in this situation it is not so profitable to buy and convert SBDs to STEEMs
You can still profitably buy and convert SBD into STEEM if you can buy it for less than about 64c (conversion rate at time of writing, ignoring future price and supply changes, etc.)
The side effect of artificially elevated IMP is that the values of articles are also increased, as it counts with IMP and not with the real value of STEEM (it may vary depending on the platform you use
This is an unintended UI bug with steemit.com and is being investigated. Some of the other UIs are working on correcting it as well.
Another solution may be the intervention of witnesses. They can, for example, increase the Maximum SBD Debt Ratio
This would not be advisable at this time. The maximum ratio was put in place for a reason, which is to prevent enormous unstable dilution of STEEM as its price undergoes extreme declines (which is what we have seen). The flip side is that holders of SBD need to be aware that they too are not immune from extreme bear markets. They can count on a secure stable (at least minimum) value for day to day purposes but must also accept the risk of some losses if Steem's value crashes.