The 3.5.x update focused on automation and layout flexibility:
Previous versions were somewhat rigid regarding page placement. Starting with 3.5, users gained the ability to provide specific in automatic mode, ensuring pages are never placed outside the printable safe area. In manual mode, a preflight warning will alert you if pages are incorrectly positioned. Imposition Wizard 3.5.3
Imposition Wizard 3.5.3 includes all features introduced in the 3.5 series, which modernized the tool's layout and automation capabilities: Imposition Wizard 3.5.3
Ultimate Guide to Imposition Wizard 3.5.3: Advanced Print Imposition Made Easy Imposition Wizard 3.5.3