what do u think is better, writing gre now or after the pattern changes?

You should write the GRE now. I have heard that the new GRE pattern is relatively difficult. it will be calculated on a scale of 2400 whereas the current format is calculated on a scale of 1600. The number of questions in the old format are also less. Hope my answer has solved your query. If it has,

If you write the GRE now, it is valid for 3 years (may be 5) - if you don't do well, take the revised one!