The v2 Pro doesn't have a great spec. It will be driveable and raceable but it isn't the Mini at it's "best" (compare with the older #92228 Silver Spec M05 to get an idea of what a real "Pro" kit would have been like)

The clear CVA shocks have a reputation for breaking (never actually owned them myself), I like to have the short TRF shocks on my cars although black plastic CVAs are OK-ish. Use Tamiya's short springs.

The front gear diff is too "open". You can try packing it with putty to get a tighter action, or use a Tamiya ball diff (TA03 diff is preferable is you can find one). Best solution is an aftermarket oil-filled gear diff (I use the 3Racing diff) but you wouldn't be able to use that under some rules. CVD driveshafts are nice too.

You might want to consider upgrading the steering arms and rack to the alloy items as the plastic ones are a bit sloppy. At least it comes with the aluminium steering posts as standard which are a big step forward from the original plastic parts.

Durability wise the plastic front knuckles can get damaged easily on some tracks, the car is generally solid though.

Other parts that I generally like on my car are the stand-up front shock tower (which just makes the car better everywhere for some reason) and the softer of the rear anti-roll bars (which also makes the car better everywhere).