I see so many people stuck at 6.5 in writing and asking if they should go for EoR.
You gotta go with you inner voice if you did really well in the writing.
During my 3 attempts, I got 8 and above in all 3 sections except in writing, scored 6.5 only.
But I went for EOR only at my third attempt because I knew I wrote really well as compared to my last attempts and got 7 in the end after wait of 31 days.
Bottom line is, if you are 100% confident that you covered all the aspects like, wrote on topic, complex sentences, accuracy and Grammer etc, do not hesitate to go for EOR.
One another piece of advice. Do not go blindly in the exam after following Jay/Liz's format. So many people are following them and trust me, IELTS examiners are very smart and they will be aware of the similar format by now. Follow these trainers to some extent only, plus do your own research and emphasis on clear ideas and conclusion more.
Hope this helps.