compensatory effect i concur, normal physiology, plasma cort will be high for sure, but how much is bound and how much is active at receptor level when you got people taking 100mg a day? im not saying it doesnt work, its probably safer than tren for precomp. like you said T4-T3 conversion is increased and T3 uptake is increased, anti cort higher T3 uptake equals superior fatloss synergy.
also for people with weakend adrenals, i found out the hardway, will have adrenal insufficiency. blocked GR and low cort out put equals = hypothyroidism again in my case
became very cold, unable to get up etc, (when dieting with low carb, cort is very high, insomina etc is normal, but my case was different and i knew something was up). cold feet. no changes in bf/ waek in the gym, lower bp, etc etc....added exo hydrocort and bam, i was warm, made muscles and back to normal.
sucked though.
hopefully next round my adrenals will do better.