Why skirmish is deliberately disabled in cata prepatch?

[Snipy-faerlina]

@Killercheebo-benediction

Prepatch is a great time to test out new abilities and talents in arena skirmish settings

@Snipy-faerlina

@Killercheebo-benediction

Any reason why skirmish is deliberately disabled in this prepatch only?

@Snipy-faerlina

Does anybody else even care about this?