Yeeeees of course

a text book is used only as a reference my opinion is when u know the level of your students u can know which extra activities they need songs and games

a text book is to be used as a reference but in my opinion once u know the level of your students u can use other activities to reinforce their skills; games and songs are my favourites, pair work or collective work may seem noisy in the class room but is really useful if the teacher can check all the groups, i recommend a free session from time to time to give opportunity to the students to talk freely yet the teacher should always intervene to translate into english, i already experienced some of these methods and they give good results

Textbooks are just a starter one should try to go beyond.
They are suggested for the sake of providing students with common worksheets to work on.
So if a teacher can photocopy better reliable worksheets for all students, nobody will interfere as far as the teacher knows that his or her preparation is better than what is suggested in scheduled textbooks.
This also avoids monotony, cheating from previous years answered school books, and gives more importance to the teacher in students' eyes.
Good luck to EFL teachers; you're doing well whatever is said, comparing to some other matters and their teachers.