Is not a jet replacement ffs
Kiles is playing Astra instead of Cypher/Killjoy precisely because cNed is playing Chamber, and not the other way around.
Acend probably thought they don't need another Sentinel if they already play Chamber (a much more aggro Sentinel than Cypher/Killjoy) so they can take the opportunity and play with Astra.
I don't think it's a bad idea, but it will take some time and practice for this agent composition to work