Well, the question of who are Directors doesn't really matter.
It's the shareholding that's important.
You could form a ltd company, and transfer the properties to the company by way of a vending agreement, in return for the allocation of shares.
If you redistributed the shares among your family, they would be treated as "potentially exempt transfers" and would escape tax if you survived for seven years.
Then, on your death, the ltd company would transfer to your estate as a going concern. As long as the shares were unquoted, you should attract business property relief.
So, the "quick fix" answer is yes ... you would be better off.
But bear in mind there will be additional obligations with which to comply if you are operating as a ltd company and, in the short term, your accounts may be more expensive to prepare.