When i inquired about having a re-mapp, they asked what the mileage was and if i was on the original clutch, as you mentioned the extra power will make the clutch slip.
As my Civic has done 135000 miles and on the original clutch so i took their advice and i had the lot changed by Honda.
The only thing i must mention is that the EGR Valve gasket must be in good order as mine is leaking a little as i can smell a wiff of fumes coming into the car when at a standstill, so the next work to be done shortly.