I'm sure clubs love to be a position, with a strong local contingent, where imports can be sort to fill a role. (Or be the icing on the cake.)
Adelaide currently strikes me as a team with an exceptional local contingent.
Reality is though that teams often find themselves needing BIG contributions from their imports, and its quite common to see import PG's that are offensive weapons.
I haven't see enough of Perry to really rate him as a player. Stick him in another team, and he may be just what they need. But I think for Sydney its clear they need more from their import PG. More points and preferably a few more assists.