The timing half is there: CPP/OAS or Social Security start ages, and pension start and end ages, so claiming at 62 versus deferring is something you can run both ways today.

Draw order across accounts isn't exposed yet. Right now the engine allocates by equalizing marginal tax rates across accounts each year rather than draining one at a time, so it's solving that ordering instead of letting you set it. The manual override is a fair ask and it's coming, the engine already takes the order as a parameter and it just isn't wired to the UI.