Easter - or 'Pace' as it's sometimes called in Scotland, may well be bunged up with pre-Christian imagery, but, based as it is on the moveable feast of Passover - hence the coloquial name - it's about as Christian as you get.
Yes, the bunny nonsense is an American screw up of the hare - we know that...but the egg was first used to symbolise the stone which was rolled away in its groove, by a writer in the fourth century.
There may be pagan imigary in the egg (is there a god of chocolate?), but there's very firm basis on Christology as well.
As for new birth?
I'm all for that, since it is only possible through the death and resurrection of Christ Jesus.