Good for you, Haswell PCs are not the easiest for a first time build, particularly to OC. Your OC results are completely normal, some might say above average, but that is a Haswell thing, a major design change changed things.
I agree about Smart Connect. I suppose users with slow Internet connections, or extremely impatient dispositions that can't wait for a web page to refresh might like it.
The IRST "Accelerate" (caching) option will appear in the GUI only if certain aspects of a system are appropriate for caching. Some find that annoying, but Intel has put in enough checking in their software to prevent problems. I can't see your system specs so can't comment further on that. If you click the Help button in the IRST GUI, another screen will appear, and the Accelerate topics are under "Optimizing the Storage System".