Yeah, I'm not sure why Maxwell hasn't bowled more when we bowled 200 overs in the innings.
In the first two tests it wasn't surprising Marsh didn't bowl much because we just didn't bowl that many overs.
Australian cricket in general has an absolute hard on for big young guys who can bat a bit of bowl 130km/h plus.
Look through the last decade or so. Shane Watson, Moises Henriques, Mitch Marsh, Sean Abbott, Nathan Coulter-Nile etc. etc. Watson obviously went on to have a long international career but the others were all promoted before they were ready and it has taken them a long time to mature into decent cricketers (with varying degrees of success).
They seem to think they're going to be the next Andrew Flintoff or something and it never works out that way.