The simple answer to the question whether you will benefit from hiring a Divorce Financial Planner ("DFP") is it depends. If there are few marital or other assets being distributed and they do not have large value or tax issues, if incomes are modest and therefore support payments will be modest then most likely it will not be necessary.
However, if there are different types of financial accounts being distributed that may have complicated tax issues including whether the account will incur capital gains/losses vs ordinary gains/losses, whether there are restrictions on the liquidation and marketability of the account, vesting issues, determination of the valuation date and whether future growth may be tax free then a DFP will be helpful along with your CPA to help you make financially prudent decisions.
If a business interest is held by one or both parties to the divorce, the DFP may be of help in looking behind and beyond the pure forensic valuation of the business. Whether there will be a buyout or offset from other marital assets, will it be paid over time, will there be interest on the payments, what are the tax consequences of how and when distribution takes place may all be reviewed by a DFP and your CPA.
Spousal support is no longer a federal tax deduction for the payor and is no longer income to the recipient. However, state laws vary and will affect whether spousal support is a deduction for the paying spouse and income to the receiving spouse. If the numbers are significant a portion may be labeled as child support so as to allow "tax" considerations on the state tax issues.
Stock options and the vesting schedule may increase a person's income significantly if the market supports exercising the options in part or as a whole. This determination may also benefit from the advice of the DFP.
Complicated real estate holding companies, rental income, profit determination, market value and tax gains and losses will likely require more extensive financial analysis.
Divorce lawyers are knowledgable in many of these areas but will routinely advise clients to consult with a tax professional, accountant or financial planner once the issues become extensive and complicated. While there will be fees for the additional professional services if you save money or avoid losing money then the benefits will outweigh the costs. The attorneys once the agreement is negotiated will be able to skillfully draft in accordance with the negotiated resolution.