Well, here is where I stand on all this fluff.
I really would like (and it appears to have 'died') any attempt to directly compare this accident with the 777 at LHR to cease.
I really would like (and it has not yet happened) that we stopped trying to argue aviation sematics/experience/mine's bigger than yours and just got on with taking all inputs, reading them and if they are worthy of reply, doing so. We have pages of attack and reply, none of which have contributed one iota to learning more lessons from this sad accident. In our own, much less important way we are here guilty of 'not minding the shop' and allowing distraction from the task - which appears to be the very thing we accuse the THY crew of.
Moving on: The idea of limiting tail trim has in my opinion a lot of merit. I believe it was aired on the A320 PGF accident thread? There is no reason on earth why a pilot should not be made to strain his/her muscles IF they want to reduce speed below Vref in the air. I personally would favour a clear - loud and visible - warning that 'limit trim' has been reached and a killing of the trim motor at that point in that direction until speed is increased. I'm sure it would have prevented several previous 'subtle' speed reductions below sensible limits.