I met a new concept in 5.0, and a bit unsure of. I work with STM32Fxxxx, I continue to use Standard Periferal library or go to Device Driver in MDK-ARM 5.0? There are some Geting startet or How to for new 5 concept?
There is no reason not to stick with the StdPeripheral Library and keep it in the project. You may replace the startup code with the Startup component and the CMSIS Core component. The drivers you can see in the Runtime Environment dialog are not a replacement for STs library but a low-level API to middleware (as of now).