The first experience that you are talking about is the correct one (doing heals and having fun). The second type (dead in 15 seconds) isn't intended and should be greatly improved by what Doom is suggesting (guards/peels). Question is, should you be forced to make sure you get guard/peel, prior to signing up for the war zones, in order to avoid the second experience, or not?
Maybe an "If you tick that box you might have an unpleasant experience" tool-tip should accompany the solo queue button
. Should be easy enough to program in