I made some research with herbs and homeopathy to stimulate both pituitary and if possible even the testicles. It seems to work. For example, Tribulus if considered as a pituitary stimulant.Yes, your dose can still be lowered. If it were me, I may have stuck with the twice weekly injections so as to avoid changing to many variables at once and just concentrated on lowering the dose further first, to see if your symptoms improved.
It is interesting to see that you are still producing some LH. This may be due to the fact you were producing very high levels of LH before TRT. It would seem you were suffering from primary hypogonadism, which is a failure of the testes to produce enough testosterone.