It really depends on you. About a month+ back, I had 3 lvl 55 characters (mage, archer, bear) just rotting away, since I didn't feel the need/urge to get to lvl 56.

But then I got some motivation (end of semester break helped too), decided to get some plat and a week later, I had all 3 lvl 56 characters with all 3 Crowns.

The update may come tomorrow, it may come in a week, a month, we won't know until its out.

So just keep playing and stop worrying about levels and stuff.

If you can afford to buy plat, the new 4x combo elixirs really makes the time taken to get to lvl 56 that much quicker.

Side note: There is still a question mark over the lvl 56 Crown once the new update is out, will it be a vanity item? will it be a dust collecting item? Who knows?