Dover to Calais is a very tough, 24/7 operation. I imagine they just want to get her back into service as quick as possible. The longer she is in dry dock, more custom is being lost, likely to DFDS.
Despite having quite regular dry-dockings P&O never seem to give the ships a full 'head to toe' repaint. Its always just a few flicks of a paintbrush. Back in 2007 you can see on the MES lines, and other areas, where the rust streaks were being left build up. Rather than address the cause of the rust, P&O seem to just paint over it, and 6 months later most of them are back again!
The Pride of Burgundy also has the same problem. On Pride of Burgundy, windows seem to be giving problems as well. Stena Europe too has also been suffering from rusty windows. I think Stena might do a more intensive repair given she is off service for quite some time, but who knows! I would imagine when Stena Europe finally leaves Stena, she will probably spend a few years in the med before she hits the beach.
Regards the central corridor workhorse, European Endeavour, it will be interesting to see what livery she will get. The house flag on the funnels are looking faded, so we might see a new one. But regards to the hull, likely be just a repaint. Might get new P&O typeface to blend in with Norbay and Norbank.