I think the concept here is strong. The speech boxes with the +, makes it quite obvious as to what’s going on. Dialogue, medical, health and even perspectives with the overlapping colours.
However, from a technical viewpoint, I would be careful… Have you considered how this is going to work in black and white? The icon could well lose it’s effectiveness. I suppose it depends on where it’s going to be used – digitally, or across their printed materials too?
It’s certainly more corporate looking – if that’s what you’re aiming for.
I’d do two, maybe three separate presentations of this. One with the icon on it’s own, one with “BlitzHealth” and the icon, and one with the tagline. My personal opinion would be to drop the tagline from it all together. It’s not so much a “logo” at this point as it is a graphic. Does that make sense? I understand you need to inform viewers of what it’s about, but this should become apparent on viewing the website, or in engaging with them through their other channels.
Type-wise, I’m not keen on what’s going on with the Z, it seems to interrupt the flow. There’s also a bit of a clash with the typeface against the softer, rounded edges of the icon. Perhaps try some rounded fonts? Or alternatively, sharpen up the icon with flat edges.
I think the “blitz” works in a heavier weight, to give it some standing over “health”. But I think it could probably work in a single weight too. Your call.
If you have the time, I’d take the icon and do another 10-20 different variations of it, at least, and stick to black / white / shades of grey, to make sure it’s clear. It’s a good concept, and I think you might be surprised at where it could end up with a bit more time…
Hope that helps. I’m a picky bugger