Almost sounds like you should have an accountant rather than a lawyer look at things.
If there are hidden implications or miswordings (or ambiguities) you two may not see them since you’ve been talking about the same thing for a while and have preconceived notions what things mean.
The pension thing is a good example - can you do what you propse (split the pension) or are you paying taxes on the whole amount? Can you legally assign anything other than the mandated amount? (Otherwise, a tax-wise couple would pretend to divorce and assign the low-income spouse 99% of the other’s pension…)
As for committing to on-going insurance, etc. - you are committed to maintain a policy, let’s pretend. For how long? what happens if, say, this is a life insurance policy and the premiums skyrocket because of a heart attack or something? What if circumstances change and one wants to change the agreement? How permanent is the committment?
Canada IIRC has separation agreements, the precursor to divorce which lays out the same things, until the months or years later when the divorce is final.