For some, a wet suit helps relaxation, because it floats.
Most will use it because of the cold, but I believe with short warmup it's not necessary (warm-up as a term being counter intuitive here, since it would be actually 'cool down').
But if you plan on competing internationally, I suggest you learn to do statics both with and without a suit. Conditions vary, and if you happen to compete in a cold outdoor pool in northern europe, it's propably good you know how to handle a wetsuit

It's good to know how to make the best of different situations and conditions and not just learn to beat your pb in the local pool in ideal conditions. Sometimes you may forget your favorite mask or the airlines loose your wetsuit etc...But you still have to compete.
Possible cons of wet suits:
-May be constrictive and thus make full inhale harder
-Some don't like the position it forces with flotation
-May constrict "skin breathing", but no one can really relaibly say how big a difference that would make, if any. But it is more or less a proven fact that some oxygen is absorbed through skin.
I predict your statics will suffer in short term if you have a good routine without a suit and suddenly start using one, but it get's back up there once you learn to be comfortable in it and how to make a good inhale.