Maybe, but I for one would prefer a legit 1B/ fringe #2 ahead of a (currently) #3/ #4 (depending on how highly you rank Silovs, Martin could be #3 or #4).
Remember too, this is likely more than just developing Martin, but rather if Petey is unhappy with the team not competing he could just not re-sign and that'd be a major step back, even if the backup goalie (in this case you're suggesting Martin) does well. I'd rather give the team the best fighting chance to compete if that ensures longer term success.