I am on Effexor and have been up to 300mg. My understanding is you should never break capsules apart.
I have just started weaning off them in the last couple of weeks. I am reducing at 37.5mg per time - the lowest dose. I am doing it very, very gradually, and if it takes me 12 months to get off them, I don't care - my mental health is much more important to me than being off meds in a hurry, if that's the way it needs to be.
I am concerned you are putting faith into a medication that you haven't even tried yet. I tried 4 anti-depressants before I got put on Effexor, and yes I knew there was issues with side effects and withdrawals, but I wanted the problem fixed before I worried about somewhere down the track.
Please, follow your doctor's advice, not what you read or hear - we all here have our own experiences and issues, and while that can give you information and raise questions, the person you need to discuss those with for definitive answers is your doc.