oestrogen is the primary suppressor of the HPGA. oestrogen suppression during post cycle therapy (pct) enhances recovery of the axis.
oestrogen rebound does not occur with suicidal AI's.
normalization of the axis, as you refer to will occur with the withdrawal of all endocrine distubances including tamoxifen, clomifin, and any aromatase inhibitor.
as to the name, its a name and for various reasons such market limitations are preferred.
however the primary purpose of AIFM is use during cycle.
there are many different opinions with respect to what is most effective when it comes to post cycle therapy. You are entitled to beleive that AI's should not be used and only SERMS should be (likely one serm over another). However there is both clinical and anecdotal evidence that supports use of AI's during post cycle therapy (pct).