If a restart could work, great, but don't be overly surprised if it doesn't sustain normal gonadotropin levels after you stop the PCT treatment. I see there was some level of LH secretion on your 10/14/14 results, so who knows, maybe it can, but just saying "don't" get your hopes up too high for a restart protocol to be fully successful.
Also, we should probably delve more into you thyroid ... Your previous FT4 results have been suboptimal within the reference range; 20% to 30% of reference range at best while you are on on a 1/2 grain of NDT. FT3 is up closer to the 50% area of reference range, give or take ...
This prompts me to really want to see your Reverse T3, plus antibodies TPO & TgAb for thyroid enzyme & protein autoimmune disorders. The ratios of NDT and human thyroid hormone vary, so that could be a factor where maybe the addition of T4 only like Synthroid could be introduced "if" you want to build the reserves up for more conversion downstream. Prior to that, get the Reverse T3 so we can compare ratios to FT3 ... If something is off on RT3, we will more than likely be looking towards cortisol and/or iron/ferritin/D3/B12.