Clear off-sides, I don't think it will be missed. Debatable/doubtful ones still may be not given/given. Even though it's still human decisions but with help of tech and its just one year of VAR since wider roll out at international level. You can compare, for example, footballs laws of today and some 20-30 years back. So, VAR will evolve and will get better. Teams got benefited the most in past from wrong decisions may feel it bit tricky to accept but in general teams will feel better and it will take time to get used to accepting decisions on the field.