I quite seriously do not rate Watson.
If i were a question of dropping Krejza (Hauritz) for someone, why not bring in Siddle? I'm not a big fan of playing two all rounders, especially when they aren't demanding a spot for each capability (i.e. being a pretty good batsman and a pretty good bowler I don't think cuts it).
We need to figure out what we want, a strong batting line up that's possibly short a bowler, or a good bowling line up that may leave our middle order open.
We've shown we're happy to not play a spinner, and we do still have Clarke and Symonds, along with Katich, who can bowl a bit of spin.
Personally, Krejza is yet to cement his spot for mine and I don't really rate Hauritz. Krejza though does deserve the right to try and cement his spot, and you can only do this by playing test matches consistently (yes I've changed my tact a little ).
However, if he were to be dropped because of the pace friendly wicket, I'd rather we took full advantage and played our best back up pacemen, not a decent bowler who can bat a bit. After all, we have one of the best tails I've seen in recent memory