I would say wait for TR3 reviews since the release will be soon.
Gaming at 1080P or 1440P, W-3175X OC offers better gaming performance in most titles vs TR2 OC and EPYC 7601. At 4K or higher, performance between W-3175X, TR2, Epyc 7601 is similar. TR3 will offer better performance over TR2. But unlikely to beat out W-3175X when it comes to gaming at lower resolutions due to higher core clock speed and OC potential.
If you game at 4K or higher, my opinion is to choose the platform that's more optimized for your workflow.