Up to this point in my career here on OC.net, I've never (to my recollection) posted in a thread that someone else locked (which I have the ability to do as a mod); however, I want to commit my thoughts before I forget them.
Alive, your argument rests on the premise that "Blessed" in English is a simple, non-nuanced word that cannot mean different (whether vastly or slightly) things in different contextx.
Take the word "Love," which in English can mean many different things. While I lament the fact that English does not have the versatility that Greek does when referring to Love, the word does indeed fill many roles: friendship/philia which is "love," intense passion/eros which is "love," kindred affection/parental affection/storgi which is "love," self-sacrificing, pure, divine love/agape which is "love." In English we know that the word "love" is used with different specific meanings in different contexts, and in Greek we use different words to denote the different meanings (although this has changed over time).
So, too, in English we can used "Blessed" to mean different ideas: conferring benefit (ευλογω) and the state of being happy/blessed/"to be envied" (μακαριος). You do the English language, as well as the hundreds upon hundreds of scholars, linguists, and translators who have used the word "Blessed" for both, a great disservice by insisting upon a limitation in English where it does not exist. There are places where English is cumbersome and constrictive compared to other languages, but this is not one of them.
Blissful, on the other hand, can in English mean things we do not wish to be confused with the meaning conveyed by the text in Greek; we must be careful with the connotations of ignorance, ecstasy, etc. that come with the words "bliss" and "blissful." We do not find the same pitfalls in our nuanced definitions of "Blessed," which, IMO when considered with the other information provided by members in this thread and what I've stated above, makes it a far superior word to use for both μακαριος and ευλογημενος.