Are there any significant implications to re-design a settings page?

We're doing a migration for some of our settings pages for our website at my current job and we're also trying to hit an external deadline. The way the current settings pages are laid out is a tabbed format. You press a tab and it opens up the account info settings like username and password. you hit another tab and it opens up the subscriptions settings (it's literally only 1 setting). You hit another tab and open up 1 setting.

I was thinking of minimizing work and putting all the settings on 1 page for the initial phase of the migration (it's about 1 full page and 1/4 page scroll down (however, more in mobile devices) and then iterating on the design and UX later. Now, let's keep in mind this is a settings page on our website and not our main product. (the simplified new settings page looks like the screenshot below.

Will this new layout of 1 page for settings have a significant impact on our users in terms of them unsubscribing from our service or deciding not to use our service if they newly signed up?

For more context, here's a close example of what the current settings looks like below --I can't post the actual design we have.