At the current new star system, it is pretty easy to get to 18 stars using tickets in CWF.

In fact, I would say we will see a lot of heros at 18 stars in a few months. 18 stars will become the norm soon. Nothing to differentiate.

What they need to do is change the amount of card for lvl 16, 17 and 18 by raising the required cards or lower the percentages after 15 stars to make starring more of a unique thing.

Just my 2 cents.