While I appreciate your linguistic argument, (such a position is called ‘descriptivist’ where usage determines meaning, rather than the other way around) we are in the Liturgy and Sacraments forum, and we should be especially careful with our usage of terms. In our world, the Church defines many terms very precisely; this is borne out in translations of documents and shown clearly when documents are mis-translated. Especially in Canon Law, there are words and terms which have very specific meanings, for example: “a just cause” is more easily met than “a grave reason.” And in catechesis, “perfect contrition” has a very specific meaning that you will find defined in the book, The Catechism of the Catholic Church.
Therefore, while we recognize that “Eucharistic Minister” was a common term in the past which referred to EMHCs, the Church in her wisdom has deprecated this term, and I think that you will find in reality that nobody officially representing the Church will use the term “Eucharistic Minister” when they in fact mean an EMHC. The term may still be ingrained in the minds of many laity who used to understand it as an acceptable term, and that is where you find it in common usage. But the fact of the matter is that “EMHC” is the term the Church has decreed for this purpose, and as you have seen, using another term like “Eucharistic Minister” stirs up confusion and ire because it is imprecise. It is imprecise because it lacks two things: It lacks the term “extraordinary” which has a very specific meaning in Church language when it modifies the term “minister.” It also uses the term “Eucharistic” which connotes the ability to celebrate and confect the Eucharist, which are faculties reserved to the priest alone. (Not even a Deacon is able to validly confect the Eucharist, while he is an Ordinary Minister of Holy Communion.)
So please do not promote the usage of an inaccurate, outdated term on such a linguistic basis. If laity such as us begin using the correct terms for things in the liturgy, then others will follow.