There's just 3 choices:
1)Maintain Flap 30 and try and hold speed and land.
2)Retract to Flap 15, accelerate to +20kts, try and hit Flap Inhibit, increase autobrake setting- but not if low down!
3)Apply go-around power, retract to flap 15, gear up and accelerate to +20kts, go around and retract of Flap 1 immediately.
Seems to me any of them are justifiable depending on the altitude. Maybe they wanted to try and get away from the birds, but then events overtook them and they were committed to landing. The important point is any of those outcomes are correct, so please people stop criticising or suggesting you know a better way of doing it! We were not there, we do not know the exact circumstances, but there must have been an enormous frightening racket of birds' bodies hitting the cockpit and flying past the windows. I can understand and sympathise with their predicament. The outcome says it all.
It would be interesting to know the extent of damage to the engines. Until we get any official word, any more is just foolish speculation and a total waste of time!