It's not that I dislike them.
cigalikes offer portability, but at a cost. As the OP was saying, he has had problems with the battery and the battery life.
The Blu is around 90mah though, so of course the battery is not going to last long.
What Blu has going for it is that it feels like holding a cigarette. For some people that's very important. Even a 510 or 808 will be a little bit bigger than a king size cigarette (a shorty 808 is the length of a 100, but quite a bit thicker), but they still are closer than an Ego, which reminds me more of using a hookah than a cigarette.
I think Alisa is onto something... I've messed around with Ego batteries (because it's what most on ECF recommend), even considering a variable voltage mod, but still not completely kicked the habit of smoking (though I have cut down a lot and even started to get some of the quitter's detox going on). I think its because the setups that are popular with more veteran vapers on ECF do not replicate many of the important aspects of smoking for some people, and a cig-a-like can do this, particularly if it is paired with a good
juice. I now think juice is more important than the hardware, it seems many on ECF are fascinated with technology and gadgetry but I believe the juice is more important.
Another option for somebody to consider upgrading from Blu would be getting a Blu premium kit, which is a 510 cartomizer setup (the basic Blu is not a 510, though the threads are the same). Then you can buy third party cartomizers and refill them yourself. I have considered doing this as well, but right now I am happy with my KR808's and I plan to get rid of most of my Ego batteries and focus on cig-a-likes, as my focus is getting off analogs, not finding a new gadget-focused hobby.