Presumably this is a Skyactiv diesel? If so, the oil warning light will probably be due to contaminated oil and a raised sump oil level because the DPF has not been regenerating properly. If you stop the car during a regeneration (which happens every 250 miles), the extra fuel pumped into the engine to actively regenerate the DPF will sink into the sump.

The brake judder might be due to slightly warped discs from sitting on the brakes after a long brake (for example into a roundabout). The part of the disc clamped by the pads cannot cool at the same rate as the rest of the disc. Alternatively the callipers may be dragging slightly and need greasing with Copperease.