I dont think it will I/O . The v2500s/CFMs on the 319 can't be derated any more than they already have been, and for single engine controllabilty the 318 needs smaller engines. However it certainly won't be short of wing area - its the same wing as the 319 & 320, and 99% identical to the 321. Landing it in gusty conditions at light weights will be the fun bit if the 319 is anything to go by.