I think that the new short selling rules are unnecessarily burdensome.
Instead, the rule should be (and for every stock). If you fail to deliver, you're forced to cover immediately and have a penalty on top of it (If you profited off the trade, the penalty is at minimum your profits).
This leaves it open to the shorter:
You can make arrangements to borrow, up front.
OR
You can go ahead and short if you know you can borrow it. However, if you end up not being able to borrow it, you face big losses.