"Unbloat" is bit of a misnomer here, I think. It comes with a few VZW apps which can be disabled. Deleting them will not speed up your phone more than disabling them will.
Also, if your sole reason to root is to disable the single security precaution that your company asks of you in order to protect their data and intellectual property, well, as an IT employee myself, I'd suggest against it. You might even open yourself up to legal action if their data or networks were compromised due to you bypassing their security protocols. If you can't deal with the PIN lock, I'd recommend just removing the exchange account entirely - use the web interface if it's available.
Just my $0.02. There are lots of great reasons to root your phone. Just not sure the two you listed are among them.