The current flow is well suited for beginners who need explanations about every step of the configuration wizard.
Once they went through all the steps and learned about each step, it's no longer useful to force them to load 7 pages of content they already know. It would be better to let them access it only if they want to.
That's a quick win, but the best option IMO would be to offer either the wizard way or a single-page set up with all the simulation controls, instead of showing them only as a static recap. One would still need to be patient when the simulation runs, but it would massively speed up its configuration.