That kind of confusion seems to only extend from your comparing it to Magic. I don't see how it's more confusing than literally any other name you could give it otherwise. (And it's a pretty well-suited name. Expanded makes it clear there's more cards than Standard, and Unlimited's existence makes it clear it's not a universal format.) Expanded is clearly meant to be "balanced Unlimited". They can't include older cards because the formats were very different, and cards that were the norm would be stupid now. (Hell, even something as recent as Junk Arm would rip the format wide open.)
As I mentioned before... I really couldn't care less about the Battle Arena decks. I don't play Expanded, have no reason TO play Expanded, and have been playing for a long time, and hence have most of the stuff FOR Expanded in the first place. So barring Standard-legal reprints that are actually worth the high price of the deck... Not for me.
The confusion comes from people thinking expanded is a rotating format that has a more sets in it, kind of like Extended in Magic. I was thinking that there may be players who play both Pokemon TCG and Magic, so if Expanded was called Modern, there would be less confusion. You may think it isn't confusing, but as you can see, some people are still confused by it, and they may also be MTG players, who used the terms "Extended" to mean "Standard", but with more sets and a set rotation. I'm not confused by it, I'm just stating some of the things that may cause confusion in some people, especially with the word "expandED", as in, past tense, something that did the act of expanding in the past.
When I think of the word Expanded, it means something that was expanding, but stopped expanding. The act of the number of sets expanding is still in place, because as time goes on, and more sets are released, the format will have a growing number of sets. When someone thinks of the word expanded, the act of expanding has been done in the past, that is, the act of having more sets in the format, and thus, if something is expanded, it means that the number of sets in the format grew from standard, but remained constant, thus a set rotation. It has nothing to do with me comparing Pokemon TCG to MTG, although using the word "modern" will lessen the confusion due to some players who play both MTG and Pokemon TCG, but using the past tense of the verb "expand" causes a lot of confusion, because the number of sets in "expanded" is constantly expanding, as if it was happening in the present.
A better term is to not use the past tense of a verb that means "to increase in size". Then maybe people won't be confused.
