Yes, for such a scenario the answer would be an unqualified "Yes". Except 
that we have some catch up to do in Hana before this solution has the same feature richness as Data Services. Most of the problems stem from the fact that Hana is a platform. Take workflows for example. In DataServices Workflows are standard, would not be much of a problem to add this functionality to Hana as well. But instead we want to use the Business Process Modeling feature of Hana and not an isolated ETL-only solution. Not only for development cost reasons but also because then you can build ETL jobs like: start dataflow1 -> let user review the result -> when finished continue with dataflow2.
There are solutions even today, using above to start tasks or using SQL Script to assemble workflows, we just want to get better.
Hence my advice would be to get started on the Hana to gain experience. If you have Data Services already, do not exchange the technology right away. There will be a migration path from the DS engine to the Hana engine later anyhow.