all in is fine. if you flip for a dbl up early you'll get 1 caller and youll probably junp to top 10 in the field ez...vs waiting for cards and being a little short stacked and getting called by everyone. Typically your pocket pair is less than 50% 3 way any way so your not losing too much odds by playing a possible 50% hand 2 way vs 30% 3 way....