I am not on TRT so take this with a grain of salt, if you feel fine (mood, libido, arousal, and performance, pain and anxiety free, etc) and your CBC is good (HCT, HGB, etc, I'd keep this treatment for 3 months and then test again.
Nipple sensitivity is not necessarily gynecomastia. If you don't have a growth underneath the nipple, which I've been told can be painful, then it's not something you need to worry about. Your estradiol level is good, unless you have other symptoms.
With any exogenous hormonal treatment, your body is going to be thrown out of balance, this means that other hormones will be high, low, etc, and that will cause symptoms. It takes time for the body to find a new balance.
You've probably heard the phrase that "better is the enemy of good". Trying to chase "optimal" values can sometimes be counter-productive, and then again, what's "optimal"? There are values that are optimal for you individually, no one here can tell you what they are.
My advice, go with symptoms and blood work, give it time, and if it ain't broke, don't fix it.
Good luck.
