The thing I liked the least about the Solo was the draw. I got used to it, but it's definitely a 180 from other vaporizers I have (LSV is super wide open airflow). That being said I think everyone should have a Solo, even just as a backup backup vaporizer, I love mine that much. The extra battery life is great, actually getting to select temperature is great, faster heatup time is great... but they apparently haven't improved our biggest gripe... Using the PVHES stems kinda thins out the vapor, even at the highest temperature, which is something I don't really like. One thing to keep in mind too though is that at some point a few years ago Arizer changed how they make their glass stems and as a result the business end of the stems became a lot flatter. So much so that some of my stems I have to really tilt to open up the airflow because they'll otherwise sit flat and almost completely cut off the airflow. Some of the older stems I had were much more uneven on the bottom and had a more acceptable airflow through them. Since I already have a Solo and it's the old one that has "actual" power adapter capability, the Solo 2 isn't very appealing to me. Mine's been relegated to "leisure portable vaporizer at home that I sometimes take to a friend's house or lend somebody" duty. Anybody looking to get a Solo would probably do better getting the Solo 2 what with all the updates to it. I don't think a lot of us older heads are going to be springing for it over a different vaporizer.
The connectors for battery packs and replaceable batteries are different and may have required a different kind of circuit board, possibly changing the size of the vaporizer. You're also going to have to deal with people using the wrong batteries and any possible physical damage that can come from that (and possible early mechanical failures because of it), and any possibility of people using knockoff batteries that are severely underrated for the application. It's pretty unlikely to happen but I bet knockoffs have a higher catastrophic failure rate than properly vetted cells that aren't thirds or fourths. Nowadays even the knockoffs aren't too bad for the small amount of amps and watts these devices draw but you won't catch me surprised if people get unlucky with shady batteries.
+1 on the VapCap, that's another vaporizer I think everybody needs to have one of in their arsenal. The reason my Solo is "leisure at home portable" is because of my VapCap. Just so much smaller and stealthier and quicker to heat up. The load is half of the Solo's but I get it much quicker and in less draws... peak plasma levels is what we're after
I'll still lurk, but will try to be more sociable occasionally ! I too thought there would be more anticipation here, maybe the changes in the solo II aren't enough for some? It's got my interest anyway!
So I don't think I will go for the 2. From what I have gathered, the 'major' change is quick heating and temperature selection. The overall experience remains identical. The unit that I have is still quite efficient therefore.