clBLAS is, in my opinion, hard to build AND hard to integrate.

On top of it, this approach gives better performance in most cases even on AMD, and especially on Nvidia. Now, I have AMD hardware, but it is better to create an overall more encompassing library, thus I avoided clBLAS :)

When I need to write my own OpenCL kernels, I use ClojureCL - it gives me easy management while still retaining full control of the kernels and their performance.