Interesting timing on this, as I was just looking at Samsung prices yesterday...
Windows Indexer is another thing to keep off an SSD. There is a lot of system setup required to use them for their intended purpose. I have read some articles that have hinted that heat is a primary performance issue, as SSD's do get hot. This makes me leery of laptop usage (where they make the most sense), since laptops run hot to begin with and "putting a fan on it" won't work. Never tried such a thing, and the only BSOD I get is a conflict of IE/Flash/Realtek drivers... enough YouTube browsing in the right phase of the moon will BSOD me. Same routine, audio blip, and BSOD 10s later.
I got a Patriot Wildfire 240GB over 4 years ago and it is still kicking. It does not like massive read/writes (such as unpacking/installing Dim Pro), and never did even when I first bought it. I did rebuild this machine from scratch in July 2015, and wiped/formatted it fully before re-install. Firmware updates have a narrow window after the OS is laid down before Patriot's utility can no longer see the drive (issue with Patriot specifically), and I did reload a clone after the rebuild just to test it out (also required a full reformat to execute with Macrium Reflect). Benchmarks has dropped about 10% over time (I do these on initial builds), but that is expected.
I am wondering if cloning could have been an issue as you suggested. I have always used "opportunities" for rebuilds to start from scratch to purge the registry and all associated garbage. Typically data files only will make it back onto the rebuild, since I also worry for "cloning a flaw" for no reason.
Did you clone the SSD to the HDD when you switched back to an HDD?