Jamie, I'd suggest upping nicotine levels slightly as well. You can add me to the list of people that Whole Tobacco Alkaloid (WTA)
juice helped, as well. I ordered mine as unflavored from Aroma E-
juice. That helped me through the whole "transition phase" when I was ready to chew through steel at times. It's pricy, but it has been my experience that you don't need a whole lot of it. It helped me to put a TINY squirt into each tank when I filled to start, then I kinda slowly weaned myself, and I still have a tank with some WTA in it that I have around for those high stress/high pressure moments. But, I think you may wish to start by upping your nic a bit.
That said, with COPD, it may be harder to get that deep, full lung-inhale, like many sub0hmers want, (which I hated to start, as my lungs were shot, anyway, though not to COPD levels, just headed there). I did far better on a small MTL device at higher nic level and lower watts, meaning cooler, more easy to handle vape. I just plain didn't enjoy how sub0hming made my throat and lungs *feel* and I couldn't handle the sheer volume of vapor. So, that is another option, if you are finding yourself desirous to pick up a cigarette but not necessarily wanting to vape your current device-- a smaller, more mimicking of a cigarette device that gives you more nicotine per puff, but less vapor. I found I ultimately enjoyed the smaller MTL feel of tanks, so that is what I use.
Good luck!
Anna