I think it would have had more interesting battles had kishi involved other villages more. I was looking at some head band logos and I saw symbols for other villages like snow,moon,fire and such. I think it would be cool to see a group of fire land genin and their sensei accidentally step into hidden grass territory and get attacked by a similar group . It would basically be like some fire based jutsu and techniques vs grass/earth based techs. Kind of like if zabuza would have had 2 other genin with him when he and haku fought team 7,.even though haku wasn't genin level. Each village could have a tailed beast jinchuuriki that we actually see ight. I think it would be interesting.