You're absolutely right - they remove, not kill. (The warning about oversimplifying applies to "kill" too.) You're also right about filters with pore sizes larger than .2 microns - I'd personally never buy one that wasn't .2 or smaller (are there any smaller?)

One thing that seems to get mentioned in connection with the larger pore size filters is the ease of use: it's a lot less effort to pump them (because you're not trying to push the water through as small a hole.) Don't be misled by "easy to pump" nonsense. In fact, I think the advertising about how easy it pumps is one of the reasons I'm having difficulty building confidence in the MSR Hyperflow I'm trying to like. Its specs say it's a .2 micron filter, but I keep hearing a little voice in the back of my mind saying, "But it pumps so much easier than the Miniworks; are you sure it's .2?")