Seanez? Meh.
Two words:
Draft pick.
Seanez was a type B arbitration eligible free agent. He made $400k last year. The "worst case" scenario is he accepts arbitration and we pay him $500k for his services next year and he's an end of the rotation guy. The best case is he signs somewhere else and we get the compensatory draft pick.
There's absolutely no downside to offering Seanez arbitration.
Likewise, for Moyer, getting him to agree to a 1 year deal is exactly what we want. The sticking point has been that second year. So with Moyer it's a win-win. Either we get him for a year, or we get 2 draft picks between the 1st and 2nd round for him. Either way, it's a GREAT move.
And Burrell? This just shows how drastically undervalued he is by the phillies. Sure, a 4 year deal for Burrell would be bad. A 1 year deal would have been great. Burrell's OPS+ the last 4 years: 128, 122, 127, 125. That's not going to be easy to replace, and certainly not going to come cheaper than the 1 year, 15 million deal Burrell would have gotten in arbitration. And if Burrell would have signed elsewhere? Again, 2 more draft picks.
Do you know how the Yankees got Jaba Chamberlain? You won't like this. Compensatory pick FROM THE PHILLIES for signing Tom Gordon. The Yankees gambled that Gordon wouldn't accept arbitration, and it paid off with a potential future ace for nothing. They also got Ian Kennedy out of the signing. They got Phil Hughes because they offered Andy Pettitte Arbitration.
Do you know how the Mets got David Wright? Yup. Compensation for the Rockies signing Mike Hampton.
What, again, was the downside to offering Rudy Seanez arbitration?