I took a one year break after Heavensward because I wasn’t excited about Stormblood at all, I didn’t want to leave Ishgard and didn’t think the game could get any better for me. After a year I returned with a freshly fanta’d character and played SB and loved it. It was already well into its patch cycle by then, I think up to 4.3 maybe. I’ve taken smaller breaks in between, the most might’ve been 6 months, and I always feel refreshed and excited to discover new things. Sounds like that’s what you need to do. Burn out is perfectly normal, so don’t worry!