It depends ...
Wich subclass? Can we choose? Can we choose multiple? And if ... how many?
Wich race?

And will it get futher updates if we will be dissapointed with its design ... or it will just stays the same no matter how many pages will be written about it (ehm, elfs, ehm)
About level 5 ... how many spells will that include? :P Since as far as i know, we dont even have "all spells" for levels 1-4 so far.

Its hard decision. :-/
What if i say that i would like new Subclass ... and i would like to choose Oathbreaker paladin?

Is that concidered cheating?

Ok, ok, seriously for a second ... i would say
New race, but only if that race would be Dragonborn, and only if Larian will show them to us bcs they would like to know our opinion on their design, and stay ready to adjust them a little. :P