Don't understand that obsession with increasing thrust (well, it sounds a bit like ssg). Take off performance calculations take into account the current conditions, obstacle situation and any other special conditions. We do fly into airports with quite a bit of terrain around like SZG or INN and have all the special approvals one can get for those airports, we wouldn't even think about increasing thrust until cleaned up there, there is simply not need to do so. It is much easier to fly the airplane, don't fiddle with any thrust issues and follow the EOSID. And of course the lowest V speeds we use are well into two figure territory on the NG.