Maybe it was discussed, but I don't know no an official response from Mikrotik.
The Layer 2/3 switches are good products, but this mikrotik hybrid, router+switch are not helpfully solution.
The routing performance are very low, and can be disappointed to customers and they buy another brand.
The routing performance not enough for a simple home user, but they not use 24 giga ports, little company need more routing speed.
They are very happy buying a router+switch but really they can use only as switch, and not so simple to set up.
So Mikrotik, is my opinion, you have two possibilities, made a SwOS version for CRS series, it not cost much and the customers who use as switch will be happy, or second way increase CPU with a cheaper dual/quard/octal core CPU, this will increase the price, but the client want a router+switch not only switch!
Maybe at Prague MUM we will get some new products and SwOS for CRS?