Yep, not good. Obviously a secondary problem to the current awful charge curves, but even that 350kW limit is going to be a 12% penalty up to about 25% SOC (and a bit less, and decreasing, penalty up to wherever Model 3 hits 222kW, where the idealized Model3-like pack would become the limit). Anyway that artificial capping is going to be painful when it comes to waiting a couple minutes more than you’re used to on a stop!
And it’ll be catastrophic if you have to share (even with Model 3, charging stops at V2 are catastrophic due to long start times, unreliable connections, slow peak speeds, and having to rapidly move spots while charging to avoid sharing (when it makes sense, which unfortunately is often, but have to do math in your head about whether current 72kW rate which may increase to 107kW soon will make sense vs. moving somewhere where you may get 144kW)), so they need to act to avoid that issue. V3 superchargers are great, with their lack of sharing or any limit on the 250kW output in most scenarios.
Again, the current pack limits pose much bigger issues right now, but this will be the next complaint if they come in low with the 350kW limit (unless they can move the taper up to much higher SOC). Need the 400kW or 500kW for bragging rights anyway!