Getting a scheme up and running, changing its benefit structure, or even closing it down, can all be achieved smoothly with the right planning.
Lining up the team of professional advisers earlier, rather than later, in the project can make an enormous difference in managing the issues that arise. All advisers in the team need to have a good working relationship with each other, as you will need everyone involved to pull in the same direction.
It is important to talk through your plans, even if only provisional, with the professional advisers involved (or prospectively involved) in your project. Attempting to keep advisers at arm's length can be counter-productive; it may appear to save on professional fees in the short-term. However, if issues are missed by not having specialist advisers on board at the key stages, then time and fees can be wasted, particularly if the project cannot ultimately proceed as originally planned, or as originally costed.