Kernrechtsfrage
Whether the appeal against the cantonal interlocutory order refusing a second written exchange was admissible under Art. 93 BGG.
Extrahierter Entscheid
The appeal was not admissible because no irreparable legal disadvantage was shown; the alleged hearing violation could still be raised against the final judgment.
Extrahierte Begründung
Orders on pleadings and evidence generally do not cause irreparable legal harm, since defects can usually be remedied on appeal from the final decision. Efficiency concerns and the possibility of a hearing under Art. 316 CPC do not satisfy Art. 93(1)(a) BGG.