If they just set the topic and let every member state to decide about the design, that would be actually interesting.
That is what the Euro/Star program is for. One common theme, and every participating country picks its own design. Used to be silver collector coins; now it can be pretty much everything. This year's French "Peace" €2 coin, for example, has that logo too.
No, I am basically OK with a common issue that has just one design. But in my opinion, that should indeed be one type then, issued by all euro area member states like the euro notes are. Since that would mean touching some holy grail

it won't come to that. Consequence for me - just as I do not need five German coins (A-D-F-G-J) per issue, just one, I plan to get precisely one of these European Flag coins.
Christian