Doyle Brunson has a rule.

You don't ever want to get broke in an un-raised pot.

This is the kind of hand where you could go broke, in a pot that isn't worth very much to come in for.

Limping is for extremely powerful hands in EP (AA, KK) hoping for a raise, so you can really ramp it up....

OR, limping is for suited connectors, from late position, so that guy that limped KQ off and flopped top pair is actually not the favorite to win the pot.

Try it, put one of the random hands as 4d,5d against your KQ off, and see how often you win.

Your Pre-Flop Raise may push 4d, 5d out here. Or at least give you some kind of clarity that he has 4d, 5d with the way he plays it.