I guess it depends on what you realy wont to get out of the martial arts. If wearing shoes screws up your foot work and makes the kicks harder, well then your realy going to be screwed when you get into a real fight. I dont think anyone is going to wait, and give you time to take your shoes off.
I would suggest to train both ways. Dont ware them in class, but do all techniques with shoes latter , and bag work as well. shoes will also give better protection against broken toes and sprained ankles. Thats why most military units wear combat boots and shoes, and dont go into battle barefoot. shin rakes and toe stomps are alot more affective also. You do have to adjust some of the kicks, if you are used to doing traditional kicks, were you kick with the blade of the foot. Most shoes do not let the ankle minipulate as well as being barefoot.
But I have never trained in a traditional system, that goes barefoot, and it would realy mess me up to get into a situation were I was barefoot. I can hardley walk out to get the mail barefoot.
Your friend in the Combative Arts, Redfive