I know a few of there ops staff have lengthy previous service, and most of the others have a good 2-3 years experience add into that the tupe staff from servisair, some of which i know are good too and it looks ok. the existing ramp staff are good and again with the experience from airways that should be fine too.
you will always get teething problems, with any change of GHA and i am sure ezy are expecting this for the first few weeks.
As for 30 min turnarounds its becoming pretty much industry standard these days.