I can personally vouch that kratom got me more high when I was on suboxone (but so did other opiates, just not AS high, and it's a waste). The withdrawals from subs varies from person to person.... but the general consensus is that the withdrawal is less intense than other opioids, but lasts much longer. It laster over a month for me. You can't just say the w/d from suboxone "is nothing". That's nonsense. Also, most people already know you can IV subs.
The only time I went into precipitate w/d was when I used an oxy or something, then used a suoxone without waiting long enough. And it's no fun. Way more edgy than regular w/d. You don't have to worry about precipitated w/d if you do a suboxone... then do an oxy a couple hours later.