If you have done an investment into traditional relational data warehouse technology and are now stuck in managing multiple ETL processes, then recommended cause of action is to use Dat-a-MazeHouse as integration components in various bottleneck areas of your system. Start fixing most expensive places in your DW/ETL pipe and achieve full agility in iterations with Data Integration and Migration components.
It might be so that your need is as modest as to integrate some data sources to perform ad-hoc analysis. You have no intention to build and maintain a data warehouse. In this case we can provide components that help you to do just this. Once or at need bases. Fast and at low cost of ownership.