Showcases

At first I LOVED Showcases. It was really interesting and it reminded me of contests alot. But after a while it got really boring cuz Serena kept using the SAME moves over and over. Furthermore, We didnt get to see Elle full performance which was disappointing

No.
I really don't want these popularity contest return to the show.
The contest was just way better because:

1) The men can be in there: Not girls doing cute things only.
2)The battles make them more interesting.
3)We have judges to know who are in the next round. In the showcase is a popularity contest, a freaking popularity contest(Jessie was way better than Serena and the other girls most of the time if we really talk about the originality and quality...).
4) The trainer is not the star is the pokémon, the most important thing in the franchise. The pokémon, not idols who don't even can sing...

No showcases

Bring back contests. I was always interested in how some battle moves were used to either enhance other moves, block other moves, or compete with other moves in contests. Bring back Zoey!

Showcase is not even a competition , Its more like a Fanservice for Guys.
The Only thing good about Showcase is all the Cute girl appearing in various outfit.
Contest has every good point of Showcase , Plus Battling.