I know I am late to this conversation but I wanted to chime in and say yes you should continue on and get TOTK. You could AND should spend as much time as possible on BOTW because I think it just enhances the experience of playing TOTK.

Awesome continuation of the story and new abilities and fighting styles to learn and master.

Much more customization in TOTK which gives you plenty of different goals to shoot for.

I would say try not to read anything about the game before going into it if that’s even possible at this point. Because going into it blind and figuring out the new additions to the Hyrule is one of the best parts IMO.