Yeah. You'd have most of the same issues you get with meth withdrawal in terms of low energy, depression etc with the substitute of insomnia instead of hypersomnia (and during WD god knows I'd rather be sleeping all the time than not being able to sleep) and plus if you rush it or come off a high dose you'll get sickness on top of it.
You should know you've inspired me to come off subutex during this lockdown. It seems like the best time and your success has motivated me to do it. I'm getting some gabapentin on Friday and am planning to go from 2mg which I'm currently on down to 1mg for a couple days, then .5mg for a couple days, then jump off completely. I'm actually excited about it - I've been on and off heroin for years but haven't been entirely opioid free including subutex for at least a couple of years. How have your symptoms been today/yesteday? How's the emotional/mental side of it?