Sounds very interesting. But this cannot be done in the redirect finisher of the form framework, as the form framework only depends on flow and should not depend on neos / CR logic. So this means you have to build your own finisher (which is easily doable) and put it in an own package which depends on Neos / CR and form.
In this case, It would be also cool to put the target to the form nodeTyoe so you can select the target page in the inspector and use that reference in the finisher.