Wait, aren't they supposed to be reforming the senate to prevent wonderful mistakes like Muir?
That's the long-term goal, although no bill has yet to materialize as of yet. If Abbott wants an early election this year he can do one of two things regarding the Senate:
1. Have a House-only election and move the Senate and House elections out of sync; or
2. Have a double dissolution.
If he goes with option two (the more likely one), the Senate crossbench will most likely grow because of the lower quota.