Need Solution- Changes at DR should be replicated at DC

Hi,

I have SQL Server 2014 Standard Edition 

Active/Passive Server at DC and Standalone at DR

5 database need to be replicated to DR

Once Switch-over / Fail-over happens Application will point to DR. Changes will be done at DR. 
Then again Switchback/Fail-back will happen and Application will point to DC. The changes happen at DR databases should be reflected at DC. 

1. Log-Shipping is One-way replication from DC to DR. Before Switchback/Fail-back Log-Shipping has to be configured again
2. Database Mirroring - Changes will be done at DR will be synch with DC during Switchback/ Fail-back. There are 5 databases.
   The database size is around Terabytes there can be performance issue.
3. Merge and Tran with update subscription are object level technology. Also a new column is added in table which might create      connectivity  issue when application communicating with Databases.

So which technology should I prefer for SQL Server 2014 Standard Edition Active/Passive Server at DC and Standalone at DR. Is there any other solution then please let me know

Regard,
Nikhil P Desai