They are 43wp instead of 45mm zokes. They might be better if they were rebuild-able, but I have not seen a post saying that they are.
In the beginning of the suspension threads there were some posters who said being able to tune the suspension is overrated. That is only true, if the sealed up one size fits all is true, but it is not. If you can respring and revalve them to your weight and style that argument has more merit.
The Esa option will be an improvement, because it is an adjustment of the compression valving. Whether that is compatible with any spring changes is yet to be seen.
As to what is wrong with the Marzocchi forks, this was my finding too:http://www.motorcyclistonline.com/ho...s/viewall.html
Unfortunately, the last I heard After Shocks is no longer in business for a cheap fix, though Phil Douglas may be around? Desert Dave had one of his fixes.