For 2018 I truly hope that STM will put more effort into making X-Cube a real tool and all processors supported in the Arduino / MicroPython worlds.
I just purchased the X-NUCLEO-53L1R1 and NUCLEO-L476RG just to be disappointed: No X-Cube integration and the Windows based STSW-IMG008 software only supports NUCLEO-F401. Speaking of STSW-IMG008: Why? 6 year old SDK installed on my computer along with some version DirectX? Once a day my labradoodle produces a product that is better than the software in STSW-IMG008.
You want to sell parts? Make it so the shiny thing is the environment to develop for your parts.