I rarely use my soldier to solo anything that has even a remote chance of being able to kill me in pvm. When I log my soldier to solo it's usually something grey/green that'll pretty much be taken down by a quick fling/burst/FA combo to insure I get lootrights for the kill. Outside of that, the majority of the time I'm logging to my soldier it is because I'm trying to serve as the tank or need a good burst damage (concept not the special) profession. So basically, outside of soloing inferno dynas, or something of that level, pretty much any other scenario is going to have the soldier in team with some form of heals and therefore the potential reduction in damage taken by the soldier won't really outweigh the loss of damage.
With the way my full autos were hitting when I used my soldier on TestLive, I doubt I would be able to consistently serve as a tank. Normally getting a full auto off at the beginning of the fight along with other specials/perks (and continued consistent full autos) is enough to allow me to tank (unless there's a shade or taunting enforcer present). Without that full auto consistency I simply don't see that being the case.
So yeah, I hope they fix deflect in PvM especially as it pertains to full autos terminating as soon as a single bullet is deflected. IF they can't implement a better solution (codewise) then I really feel they need to scrap the whole concept/turn it off.