It probably should be a limited common element. Has the transitional conrtaol date passed yet? If so perhaps the Board can look to amend the condo docs to make the change. If not, approach the developer to do the same.
You should review your judgment of divorce to see whether that helps with your question of if she refuses. A deed is simple and should cost little in attorney fees. You would also need to pay to record it.
An option is an offer to buy or sell real estate that is held open for a period of time. The person holding the option has the choice of performance based on the terms of the option agreement. Whether either party can assign the option should first be determined from the terms of the option. The potential downside is that a party may be in breach of an agreement if they attempt to assign the option without having that right.
You likely cannot sue them for slander, but you can likely prove to them that the Board authorized your tenant and the lease that was in place. You should review the bylaws and gather the information you provided to the previous board. If you are sued you should contact an attorney to represent you. You may perhaps be entitled to a hearing before the Board prior to the time they file a lawsuit against you. Some bylaws require such a step.