Escobar has a point in that un-freezing the ATPL will bring in more money and the PIC time can help a little as most company's opp's manual (part A) will have a minimum time to get a command. This is usualy not a factor as most people will need to get the minimun time on a jet before they are ready for command.
However for some of the more gifted pilots a few more hours in the logbook might just give them enough hours in the logbook to get a command at the earlyest oportunity.
The thing that staying in touch with light aviation will do is keep your "hands on" flying skills sharp, this will become very valuble when the company puts you up for CAT C airfield training. Those who fly small aircraft take to the more demanding airfields with ease compared with guys who let the automatics do all the work.