There is this saying : Boat when reach bridge end auto straight. 船到桥头自然直
Government already say 80% carpark lot for Copen Grand means 80%

If the car park lot you find it a big issue then bo pian skip this project. It is true that some existing ECs even with 100% car park lots have very limited visitor lots and limited car park lots, but you have to know those ECs cost 600+ PSF where a lot of SG households have 2 cars as well.
Copen Grand is going to be twice the price of the ECs, I don't think most residents there can afford 2 cars, 1 car also might be a problem for young couples based on the MSR, but potentially car park will be a headache for the MCST for CG.