To my knowledge, the target frame rate of Three.js is always 60 fps. Getting higher numbers seems odd at this point. Lower numbers are obviously sub-par.
A number of draw calls of ~7’000 seems outrageous to me. Getting this number down would be of my prime concern.
I’m not sure if what you are referring to a “object/draw count” is the same as what renderer.info reports.
For comparison: my recent animation of a vacuum engine clocks at ~100 draw calls and ~240’000 triangles and maintains 60 fps on dated hardware (iMac of 2014, MacBook Air of 2017).