You'll need to test your specific intended setup very carefully in the lab. For some reason they removed some of the standard LACP command options from IOS-XE which are supported on ASR1K so 9800 only supports a subset. Config we have which works on ASR1K (even older versions of IOS-XE) to ASR9K does not work with 9800 to ASR9K so we were forced to use a simplified design with reduced feature set. This problem bounced back between TAC and wireless BU for a while before they finally told us they don't support that and not in current roadmap to do so on 9800.
