Even if they could (it’s unlikely) … would they? Philea was a pretty risky and relatively small add-on to the main Rosetta mission. Rosetta does important stuff

Even if they could (it’s unlikely) … would they? Philea was a pretty risky and relatively small add-on to the main Rosetta mission. Rosetta does important stuff all on its own, it’s not just a vehicle to get Philae there and relay data. Rosetta will stay with the comet as it gets closer to the sun and observe it.