Gamea admin has Dinosaur Ryuzaki at level 37... I wish I did too. Level grinding after 30 is absurdly extremely slow. When they raise it to 50, 40-50 will likely take a full year of grinding per level.
Yeah, not only it's absurdly slow even with 1 card challenge Vagabond, but also, higher level cap doesn't actually solve the gem source issue.
Higher level cap only solve the issue temporarily, not permanently. After you reach the cap again, you'll hit into the same problem again, & eventually the exp required will be so insanely high the gems will be unreachable anyway before a new box shows up.
What we need isn't higher level cap, but more regular source of gems that gives a decent amount of them.
Sadly a lot of people don't understand all that and keep requesting for higher level cap, because all that they think about is "more level = more gems", without thinking anything else.