Anyone switched from WP to Ghost? How was SEO impact?

I have a subscription content news site with 52 DR that runs on WP and gets around 150,000 visits a month.

It has so many plugins and the monthly cost is starting to add up.

I am thinking about moving to Ghost since everything is built in (memberships, newsletters, etc). I also like the themes better on Ghost.

My only hesitation is if the SEO gets messed up, then it would not be worth it.

Has anyone done this before and what was your experience?