I have having really bad FPS issues also and I shouldn’t, no other game is having this issue. The game often pauses for a micro second then screen then catches up. like it’s refilling the buffer or something. GPU is at 50-75% utilization or lower, CPU is using 4 cores at 40-60% utilization. Razer core fans will throttle up in GPU is being taxed on any game you play. The fans are rarely spinning up, it’s not even taxing the GPU, it just seems like bad code. World of Warcraft plays fine, no lag.
2017 MacBook Pro i7 quad core 2.9
16GB ram
eGPU Razer core - AMD Vega 64