Repair or rebuild a concrete parking lot?
If the old lot still sits flat and drains, and the trouble is a few cracked or broken panels, cutting those out and pouring new ones usually makes sense. When water sits across big areas or the slabs have sunk and tipped all over, the problem is underneath. Patching the top of a bad base only buys time, so in that case I'd rather rebuild it right, starting with the ground.
What shapes the cost of a concrete parking lot
Tearing out old pavement, grading so water runs away from the building, and building in accessible spaces and walkways all add to the job. The place owners most want to save is the base, since nobody sees it once the concrete is down. That's the last place I'd cut, because a nice finish can't save a bad base. If something has to give, a plainer finish is the better trade.