S&OP HANA Interfacing back to ECC & Order level matching question

Hi S&OP community,

I'm assuming, per the screenshot of a slide from SAP last April, order level matching is not possible in S&OP HANA, correct? If not, can we "manually peg" sales orders in S&OP HANA (if we add custom fields in the data model and flat files) and have that feed directly into ECC?

Also, as of SP03, we can interface the constrained quantity based demandplan directly back into ECC from HANA, correct? We do not need to have APO? 

Thanks for your help!