No Big Surprise Here
I don't think there is much evidence of excessive model proliferation here.
It is safe to have expected a 228i and a 235i for some time to replace the current 128i and 135i coupes and convertibles. The M235 could reasonably replace the M1 coupe.
Now that the 3 series has inevitably creeped up in dimensions there is even more ability to have a slighly roomier and comfortable smaller BMW. Let's just hope they keep the weight down and the 1-series headlights away.
The only thing here that would be news would be some kind of 2 series gran coupe. It seems unlikely as the car would already be narrow and short. I can't imagine how it could also have a low roofline and a long silhoutte. There wouldn't be room for four people inside it!