While I could care less about the "status" line, I would be very disappointed if the registration date or post count were removed.

It is significant to me if someone has been around and made very few posts--that tells me that when they say something, it is probably really important to them. It is also important to me to see an unfamiliar poster with a higher post count than I would expect--that tells me that they must post in forums I don't normally read.

I get so much subtle information from the relationship between the registration date and the post count that I would sincerely miss those indicators.