Think i prefer just shipping it in this spot, we may lose a little value but it avoids tough spots like these were the player calls imbetween and were out of postion on a A or K high board. Think there is enough in the pot and us only having like 17-18BB for us to iso the smaller 2.5BB shover and get these weaker hands to fold,i if he is limping with 44-99 and decides that 'we have AK' he may also call and were huge favorites.
Ye I like this plan, we do lose a bit of value from his marginal hands than may have peeled and folded the flop. But its less risk if we just jam.