I autocross so I consider that real performance I would say that the for Model 3 the BMW 3 series is the benchmark. Therefore the performance version should be compared to the M3 or maybe the M-performance package depending on price. Competing with ICE vehicles for 100mph+ performance is probably not worth the compromises.
Olle is right that the Model 3 has a more sophisticated suspension than the 3 series, front multilink vs. strut. The bones are good it's just a matter of proper tuning. And of course beefing up the tires, brakes, and cooling.
Is multi link better though? I would think it is based on the geometry of the arms and how it is setup to change camber, toe angles, caster angles, and etc.
I do agree if Tesla throws enough resource at it, they can probably do it. But I think it'll be difficult for them to get it right the first time though, since suspension tuning is a bit of black art and it'll be hard to do it without racing experience. I do hope they can tackle the damping right now though, because I always felt our Model X and the loaner S I have driven to be under damped on rebound, especially when the suspension is loaded in a corner with bumpy surface.