well the main thing we are looking to get out of running different compounds is this --
each different AAS drug out there has its own set of unique genetic codes and will relay its own unique information/dna to cells that it binds to. that transcribed "information" is mainly what we are after.
even though two different drugs may have similar effects on the body, again each drug is truly unique with its own genetic code its transcribing..
this is one reason why I promote phase cycling and compound rotation .  trying to get as much unique and 'new' muscle building information relayed to muscle cells as often as possible..  that information is the main thing we are after.
now the indirect and secondary actions of a compound are also important but not as important as the 'code'  .
so yes there are absolutely benefits to be had and realized from estrogenic compounds beside the estrogen factor. the estrogen factor is a secondary action.
Ment has its own unique code and DNA its transcribing to muscle cells.  I take Ment cause first and foremost I want that "secret code" 
 
now of course we should pay attention to and use compounds based on their secondary actions as well .
now I'll take Tren, for example, for the "code" its providing to cells . but it also has some cool secondary actions. like being a progestin based compound it interacts with progestin receptors , which in turn makes you more sensitive to estrogen , which in turn sensitizes your liver to estrogen, which in turn then begins to up regulate hepatic IGF output (estrogen works in the liver to produce IGF) .  so while on Tren IGF levels begin to elevate. 
thats a secondary action we should be aware of when we chose to cycle a compound like tren.
the estrogen aspect of  an estrogenic compound is just one aspect of all the different things that compound may do . so its not the only thing I look at when considering a compound or designing a drug stack