Brought it recently...

This is New suzuki Swift 2024 Vxi (o) , brought it around 4 months ago.. has been driven it around 4.5k km...it now comes with 3 cylinder engine ( earlier 4 cyl)... company says that they has done this to increase its fuel economy.... It gives me around 20km/L after 1st service.... service centre says it will again be improved after 3rd service... Just feel a bit of lag in acceleration.... What's your opinion on new swift safety and rating? Also suggest some accessories to be included..