I'm not sure that it was the plus designation that hurt the star designation, but like you, I have been a fan of the star designation since its inception in the early 2000s, but as of late, it seems rather impossible to get a star out of NGC. I sent a submission last year where I was expecting anywhere from 5-10 stars. I got ZERO!!!! Then they took away the Designation Review service this year so if I wanted to send them back for reconsideration, I would have to submit the coin under the regrade service, pay full price, and get a new serial number.
As for your original question, I typically would choose the star because that relates to eye appeal, but your Barber Dime seems the best way to go, get both the star and the + on the same coin. Currently, I only have one of those.