In terms of heart disease risk, I'd just remind y'all that one of the biggest sources of stress on the heart from smoking analogs is the carbon monoxide it adds to your blood.
CO binds to hemoglobin and reduces the blood oxygen carrying capacity, and your heart has to work harder and harder.
Unfortunately, because CO binds to hemoglobin irreversibly, you have to wait 2-5 years for your body to make all new blood.
That's not really a blood pressure issue, but it's another heart stress issue that is gradually improving for us all as we quit/reduce analogs.
It's also worth considering that blood pressure is one of those indicators that is really sensitive to a lot of things: it can be raised by dietary salt, stress, sleep deprivation, weight gain (even minor gain!), other medications you are taking (including common ones like the birth control pill), reduced athletic activity, caffeine intake, hormonal changes, other underlying conditions......and surely more that I don't know.
Still, I can definitely believe that some people are taking in more nicotine than before and it is raising BP. I actually can resolve my hypotensive dizziness by vaping a bit of high nicotine liquid. (I'm on a medication that has a side effect of sharply lowering BP, so I'm at 100/70. Some days I can't stand up without my vision going fuzzy.)
For those of you who need to reduce nicotine intake but worry you won't get the same satisfaction, I'd suggest you try an HV mod -- you get killer flavor and throat hit and vapor at the same time you lower the nic.